SOLUTION: solve the systems by substitution x+2y=7 2x+2y=13

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Question 288107: solve the systems by substitution x+2y=7
2x+2y=13
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Solve the first equation for x and plug the result in for x in the second equation.
x+2y=7
x=7-2y
plug 7-2y in for x in the 2nd
2*(7-2y)+2y=13
now solve for y