SOLUTION: X-2y=-5 3x+2y=25

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Question 757157: X-2y=-5
3x+2y=25
Answer by sachi(548) About Me  (Show Source):
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X-2y=-5........1
3x+2y=25.......2
from eqn 1
x=-5+2y=2y-5..........3
putting this value in eqn 2
3(2y-5)+2y=25
or 6y-15+2y=25
or 4y=25+15=40
or y=10
from eqn 3
x=2*10-5=15