SOLUTION: x+3=y 3x+4y=7

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Question 687069: x+3=y
3x+4y=7
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Hint: x+3 = y is the same as y = x+3

So y and x+3 are the same.

This means we can replace 'y' in the second equation with 'x+3' to go from

3x+4y=7

to

3x+4(x+3)=7

Now solve for x. Then use this solution for x to find the solution for y.