SOLUTION: substitute 3.4x+1.3y=15.2 1.7x-0.3x=11.4

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Question 1097851: substitute
3.4x+1.3y=15.2
1.7x-0.3x=11.4
Found 2 solutions by greenestamps, MathTherapy:
Answer by greenestamps(13200)   (Show Source): You can put this solution on YOUR website!

I will assume the second equation is supposed to show -0.3y instead of -0.3x....

Are you sure you are supposed to use substitution for this? It is very well suited for solving by elimination; multiplying the second equation by 2 makes it easy.










If I were told that I had to solve this using substitution, then, since 3.4 is twice 1.7, I would solve the second equation for 1.7x (there is nothing in the substitution process that says you have to solve for "x" or "y" by itself):




Then
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

substitute
3.4x+1.3y=15.2
1.7x-0.3x=11.4
Correct answer: 

IGNORE anyone who says otherwise! 

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