Ushio
Ushio
07-02-2017
Mathematics
contestada
Solve each system by elimination
Respuesta :
apologiabiology
apologiabiology
07-02-2017
x-y=11
2x+y=19
add them
x-y=11
2x+y=19 +
3x+0y=30
3x=30
divide 3
x=10
sub baack
x-y=11
10-y=11
minus 10
-y=1
times -1
y=-1
(x,y)
(10,-1)
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