anonymous
  • anonymous
How do I solve this a-b=6
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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TuringTest
  • TuringTest
solve for what?
anonymous
  • anonymous
Algebra
TuringTest
  • TuringTest
no, I mean that you have two unknowns and one equation, so you can't get a number answer so do you want it solved for a or b ?

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anonymous
  • anonymous
Its my sons homework here is the problem the way its on the sheet. a-b=6 a=2b+7
anonymous
  • anonymous
for both
TuringTest
  • TuringTest
that changes things... you need as many equations as unknowns to solve a problem, so the other equation is essential a-b=6 a=2b+7 substitute the second expression for 'a' into the first equation: 2b+7-b=6 this can be solved for b once you have the value of b plug that number into the second equation, which gives you the value of a.
anonymous
  • anonymous
so would i subtract the b or the 7 from the 6
TuringTest
  • TuringTest
2b+7-b=6 collect like terms: b+7=6 then subtract 7 from both sides
anonymous
  • anonymous
so b=(-1)
TuringTest
  • TuringTest
yes, now plug that into b in the second equation a=2b+7 and you will get a
anonymous
  • anonymous
is it a=5

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