becca9898
  • becca9898
Need help! Equation will be in the responses.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
whats up?
becca9898
  • becca9898
\[-7x+3 = \frac{ -15 }{ 2 }\]
becca9898
  • becca9898
I am unsure where to start :/

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anonymous
  • anonymous
are you solving for just x? or simplifying?
becca9898
  • becca9898
Solving for x
anonymous
  • anonymous
alright well this is fairly simple.. haha give me a moment?
becca9898
  • becca9898
Sure! :)
anonymous
  • anonymous
alright so the first we want to isolate x, right?
becca9898
  • becca9898
Correct, so would we minus 3/1 ?
anonymous
  • anonymous
well not 3/1 but just 3
becca9898
  • becca9898
I just figured the 3/1 because we have to subtract it from the -15/2... Would we have to multiply the 3/1 by 2 to have an equal denominator?
anonymous
  • anonymous
so you will get -7x=-15/2-3
anonymous
  • anonymous
and yes that would be another way to do it but either way you will get the same answer if you simplify -15/2-3
anonymous
  • anonymous
do you see what im trying to say? haha
becca9898
  • becca9898
So if I do -15/2-3 would it just be 15?
anonymous
  • anonymous
what is -15/2 ?
becca9898
  • becca9898
the problem is I cannot use decimals in this equation, they want me to keep fractions. So -15/2 would just be -15/2 because it cannot be simplified.
anonymous
  • anonymous
alright sorry i didnt know that
becca9898
  • becca9898
After doing the math -15/2 - 3/1 should come out to -9/2, right?
anonymous
  • anonymous
a negative - a negative is?
becca9898
  • becca9898
a positive?
anonymous
  • anonymous
it is always a negative so -15-6=-21
anonymous
  • anonymous
god im getting confused haha let me type the entire problem then ill explain it alright?
becca9898
  • becca9898
OK :)
anonymous
  • anonymous
-7x+3=-15/2 -7x=-15/2-3/1*2 "to combine these we need the same denominator so we multiply by two" -7x=-15/2-6/2 -7x=-21/2
anonymous
  • anonymous
okay haha thats as far as i got now this is where you come in... we will simplify with decimals then replace them with fractions...
anonymous
  • anonymous
-21/2=-10.5 -7x=-10.5
anonymous
  • anonymous
divide by -7, isolating x
anonymous
  • anonymous
x=-10.5/-7
anonymous
  • anonymous
you get 1.5
anonymous
  • anonymous
1.5= 3/2 so x=3/2
becca9898
  • becca9898
Thank you!!
anonymous
  • anonymous
haha is that one of you ranswers?
anonymous
  • anonymous
no..... thank you, for bearing with me lol

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