rezaee
rezaee
04-06-2018
Mathematics
contestada
slove the system of equations 3x-7y=5 and 9y=5x+5
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jinc0930
jinc0930
04-06-2018
3x-7y=5
9y=5x+5
-5x+9y=5
3x-7y=-5x+9y
8x=16y
x=16y/8
x=2y
3(2y)-7y=5
-1y=5
y=-5
-5(9)=5x+5
-45-5=5x
x=-10
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