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anonymous
 one year ago
Can someone help me with substitution? Anyone?
anonymous
 one year ago
Can someone help me with substitution? Anyone?

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pooja195
 one year ago
Best ResponseYou've already chosen the best response.1Hi there! Welcome to Openstudy! :D Please post your question so that we can assist u :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay if you have that and we know that obviously y=y then we can also show that 5x7=3/2x+6, correct?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay if you have that and we know that obviously y=y then we can also show that 5x7=3/2x+6, correct? \[5x7=\frac{ 3 }{ 2x }+6\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Can you then solve for x?

pooja195
 one year ago
Best ResponseYou've already chosen the best response.1Ok well when we use the susbtistuion mthod we basically substitue a given value into one of the equations lets call Equation A  Y=5x7 Equation BY=3/2x+6 Y value is given you can sub either equation into each other for now lets sub equation A into equation B \[\huge~\rm~5x7=3/2x+6\]

pooja195
 one year ago
Best ResponseYou've already chosen the best response.1Now all you do is solve for x if you need help with that ill be glad to help ^_^

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How would I solve for x though? First I know I could add 7 to both sides making the equation 5x=3/2x+13 but then idk how to cancel the x's

pooja195
 one year ago
Best ResponseYou've already chosen the best response.1well subtract the x's from both side :) 5x3/2x=?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0But wait XD the x is connected to the 3/2 fraction. You can't subtract it 😭

pooja195
 one year ago
Best ResponseYou've already chosen the best response.1ignore the x's for now

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Hmmm but then 3/2 is still a fraction tho O:

pooja195
 one year ago
Best ResponseYou've already chosen the best response.1You can subtract fraction :o did u know that?? :D

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Hmmm but then 3/2 is still a fraction tho O:

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0LOL MY BAD. would it be like 5/1  3/2?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0LOL MY BAD. would it be like 5/1  3/2?

pooja195
 one year ago
Best ResponseYou've already chosen the best response.1ok let me just explain this one to u Ok well when we use the substitution method we basically substitute a given value into one of the equations lets call Equation A  Y=5x7 Equation BY=3/2x+6 Y value is given you can sub either equation into each other for now lets sub equation A into equation B \[\huge~\rm~5x7=3/2x+6\] We add 7 to both sides \(\huge\color{red}{5x=3/2x+13}\) Then we subtract x's from both sides For x we get 26/7 Then we substitute the value of x into Equation A \[\huge~\rm~5(26/7)7\] Once you simplify you get y=81/7

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How did you get 26/7 (sorry I just really don't understand) 😭😭😭😭

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0\(y=5x7\) \( y=\dfrac{3}{2}x+6\) Since y = y, we can set the right sides equal to each other and solve for x. \(5x  7 = \dfrac{3}{2}x + 6\) \(5x  \dfrac{3}{2}x + 13\) \(\dfrac{10}{2}x  \dfrac{3}{2}x = 13\) \(\dfrac{7}{2} x = 13\) \(x = \dfrac{26}{7}\) Now that we know what x is, we plug in the value we have for x into the first original equation to find y. \(y = 5(\dfrac{26}{7})  7\) \(y = \dfrac{130}{7}  \dfrac{49}{7} \) \(y = \dfrac{81}{7} \)

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0@Pooja195 You wrote: "We add 7 to both sides 5x=3/2x+13 Then we subtract x's from both sides For x we get 26/7" I'm not as smart as you, so it takes me a few more steps than it took you to find what x was equal to. Since the poster asked how you got 26/7 for x, I thought I'd show the extra steps it took me to find x.

pooja195
 one year ago
Best ResponseYou've already chosen the best response.1Never said i was a smart person. Just didnt realize the difference thanks for explaining.
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