Kathryn014
Kathryn014
29-08-2017
Mathematics
contestada
x+3y=-5
4x-y=6
solve by elimination please
Respuesta :
royalroyfan1
royalroyfan1
29-08-2017
Multiply the second equation by 3, so 4x-y=6 becomes 12x-3y=18.
x + 3y = -5
+ (12x-3y = 18)
______________
13x = 13
So x = 1
Plug x = 1 into any of these, such as 1 + 3y = -5, which becomes 3y = -6, and then y = -2.
x = 1
y = -2
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