SOLUTION: please help me solve 2x+2y=15 0.3x-0.2y=3

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Question 1182092: please help me solve
2x+2y=15
0.3x-0.2y=3
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

2x%2B2y=15....eq.1
0.3x-0.2y=3....eq.2........both sides multiply by 10 to get rid of decimal
---------------------------
2x%2B2y=15....eq.1
3x-2y=30....eq.2
--------------------------------add both equations
2x%2B2y%2B3x-2y=15%2B30
5x=45
highlight%28x=9%29
go to
2x%2B2y=15....eq.1, substitute x
2%2A9%2B2y=15
18%2B2y=15
2y=15-18
2y=-3
highlight%28y=-3%2F2%29