renad17ahmed
renad17ahmed
26-01-2017
Mathematics
contestada
Elimination of
x-y=11
2x+y=19
Respuesta :
apologiabiology
apologiabiology
26-01-2017
ggeasy
we can eliminate the y terms by adding the equations
x-y=11
2x+y=19 +
3x+0y=30
3x=30
divide by 3
x=10
subb ack
x-y=11
10-y=11
minus 10 both sides
-y=1
times -1
y=-1
(x,y)
(10,-1)
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