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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