SOLUTION: 2x=-4y -4 3x + 5y=-3

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Question 152964: 2x=-4y -4
3x + 5y=-3
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
2x=-4y+-4 ---------------------------------------> eqn 1
3x+%2B+5y=-3 --------------------------------------> eqn 2
In eqn 1 we get,
x=%28-4y-4%29%2F2 ------------------------------------> eqn 3
Substitute eqn 3 in eqn 2:
3%28%28-4y-4%29%2F2%29%2B5y=-3
3%28%284%28-y-1%29%29%2F2%29%2B5y=-3
3%28%28cross%284%292%28-y-1%29%29%2Fcross%282%29%29%2B5y=-3
-6y-6%2B5y=-3, re-arranging
-6%2B3=6y-5y
-3=y, SUBSTITUTE IN EQN 3 TO GET x
x=%28-4%28-3%29-4%29%2F2=%2812-4%29%2F2=8%2F2
x=4
In doubt? go back eqn 1 & 2:
via eqn 1: 2%284%29=-4%28-3%29-4
8=12-4 -------------> 8=8
via eqn 2: 3%284%29%2B5%28-3%29=-3
12-15=-3 ----------> -3=-3
Thank you,
Jojo