SOLUTION: I am doing the substituttion method and I can't seem to find (a,b) I would like it if you showed me step by step how you find the answer. The question is a + 2b = 7 2a = 3b

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Question 1032944: I am doing the substituttion method and I can't seem to find (a,b)
I would like it if you showed me step by step how you find the answer.
The question is
a + 2b = 7
2a = 3b
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39618)   (Show Source): You can put this solution on YOUR website!
Solve one of the equations for a variable. You pick which. SUBSTITUTE the expression into the other equation and solve for the single variable in this. Use the value in either original equation to find the value for the first variable.
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

I am doing the substituttion method and I can't seem to find (a,b)
I would like it if you showed me step by step how you find the answer.
The question is
a + 2b = 7
2a = 3b
a + 2b = 7 ---- eq (i)

2a = 3b ------- eq (ii)

a = 7 - 2b

Substitute 7 - 2b for a in eq (ii) to find value of b

Substitute value of b into either equation to find value of a 

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