anonymous
  • anonymous
How do you find a b and c for a=-b+3 a+2c=10 -b+c=3
Algebra
katieb
  • katieb
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jim_thompson5910
  • jim_thompson5910
Solve -b+c=3 for c to get c = b+3
jim_thompson5910
  • jim_thompson5910
Now plug a = -b+3 into the second equation to get a+2c=10 (-b+3)+2c=10 -b+3+2c=10 Then plug in c = b+3 to get -b+3+2c=10 -b+3+2(b+3)=10 Solve this last equation for b. Tell me what you get.
anonymous
  • anonymous
What do you plug c=b+3 into?

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jim_thompson5910
  • jim_thompson5910
into -b+3+2c=10
jim_thompson5910
  • jim_thompson5910
notice how I replaced 'c' with b+3
anonymous
  • anonymous
thanks
anonymous
  • anonymous
b=1?
jim_thompson5910
  • jim_thompson5910
yes good
jim_thompson5910
  • jim_thompson5910
you can now use this to find 'a' and 'c'
anonymous
  • anonymous
a=2
anonymous
  • anonymous
c=4
jim_thompson5910
  • jim_thompson5910
good
jim_thompson5910
  • jim_thompson5910
all 3 are correct
anonymous
  • anonymous
thanks!
jim_thompson5910
  • jim_thompson5910
yw

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