PaigeMya
Solve for the variable in this equation.
x/2+1/4=3/4
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TomLikesPhysics
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First subtract 1/4 from both sides.
Than multiply both sides by 2 and you got your variable.
PaigeMya
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I dont know how to subtract from both sides
Romero
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what's 1/4 - 1/4
PaigeMya
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Romero
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great you did the left side now lets do the right side
whats 3/4 - 1/4
PaigeMya
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-1/4
Romero
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hmm when adding or subtracting fraction you need to add or subtract the top number.
what's 3 - 1 ?
PaigeMya
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2
Romero
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great the top number is 2 and the bottom stays the same. 2/4 Thats what you get.
ok now you have
x/2 = 2/4 (remember the left side you canceled the 1/4 )
now multiply both sides.
Romero
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whats x/2 times 2
PaigeMya
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4
Romero
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well no it's actually (2x)/2 ... the 2s in both the top and bottom will cancel so you are left with just x
now on the right side you do the same 2/4 times 2 = (2*2)/4
Whats 2 times 2?
PaigeMya
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4
Romero
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ok whats 4/4
PaigeMya
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16
Romero
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umm not your multiplied it but we want to divide.
try again 4 divided by 4?
PaigeMya
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oh 1
Romero
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great so the right side is 1
Romero
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and the left side is x
Romero
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x=1
PaigeMya
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Oh thx
amogh
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Sorry to interrupt you guys, How old are you PaigeMya?
PaigeMya
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Y
Romero
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Age doesn't matter....
Romero
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That's a creepy question @amogh
PaigeMya
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Yeah why do you want to know my age?
amogh
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Oh don't take me wrong. Just wanted to know because everyone needs different treatment , clarification needed. And yeah Age doesn't matter, you're right, but that's the best I could ask concerning what I wanted.
PaigeMya
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Okay well im ten
PaigeMya
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Can i also just ask another question right now for you guys to help me with?
Romero
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It's not about the age but the level of math you are taking.
amogh
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Sure
amogh
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@Romero Exactly, but how can someone answer to that?
PaigeMya
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Thanks, find the lowest common denominator that would eliminate the fractions in this equation.
8/9x+2/3x=1/9x+45
Romero
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By the type of question they asked. Someone can ask a linear algebra question and they can be a freshman in college.
Romero
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Which fraction has the lowest top number (numerator)?
PaigeMya
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1
PaigeMya
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1/9
Raya_Atour
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|dw:1334995268203:dw|
Raya_Atour
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so x = 1
PaigeMya
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@Raya_Atour im sorry but i dont think thats the answer...
Romero
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@Raya_Atour That's not the question.
amogh
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You might rather ask to yourself, what number should I multiply this equation with to get rid of all the fractions (denominators)
Romero
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It would be 3 if we can get 1/9 to have a 3 in the bottom but we can't because 1/9 is the most simplified version so 9 has to be the lowest.
PaigeMya
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okay
PaigeMya
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So now what @Romero
Romero
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Well you found the number that will cancel out the fractions. Now you have to multiply 9 to both sides.
PaigeMya
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both sides of what @Romero
amogh
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the equation
PaigeMya
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Can someone just give me the answer just this once because im doing this just to learn not to study im only ten andill figure out how to get the answer later im tired
amogh
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Romero answered it!
PaigeMya
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Wait then whats the answer?
amogh
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Oh its 9
PaigeMya
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oh thx
amogh
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Don't try to get a direct answer, that might not help you in the long run ;) just an advice! Straining makes you more better!