SOLUTION: Solve using substitution method. a - 2b = 3 3a = 6b + 9

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Question 309347: Solve using substitution method.
a - 2b = 3
3a = 6b + 9

Found 2 solutions by ichudov, stanbon:
Answer by ichudov(507)   (Show Source): You can put this solution on YOUR website!

you just need to use the substitution solver
Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
We'll use substitution. After moving -2*b to the right, we get:
, or . Substitute that
into another equation:
and simplify: So, we know that b=0=0. Since , a=3.

Answer: .
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
Solve using substitution method.
a - 2b = 3
3a = 6b + 9
-----------------
Rearrange:
a = 2b+3
----
Substitute for "a" and solve for "b":
2b+3 = 6b+9
4b = -6
b = -3/2
-----
Since a = 2b+3, a = 2(-3/2)+3 = 0
====================================
Cheers,
Stan H.
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