Question

How do I solve this a-b=6

Answer 1

solve for what?

Answer 2

Algebra

Answer 3

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 ?

Answer 4

Its my sons homework here is the problem the way its on the sheet.
a-b=6
a=2b+7

Answer 5

for both

Answer 6

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.

Answer 7

so would i subtract the b or the 7 from the 6

Answer 8

2b+7-b=6
collect like terms:
b+7=6
then subtract 7 from both sides

Answer 9

so b=(-1)

Answer 10

yes, now plug that into b in the second equation
a=2b+7
and you will get a

Answer 11

is it a=5