15-04-2015
Mathematics

Answered

-2x - 5y = 13 2x - 5y =17

Answer :

15-04-2015

{-2x-5y=13

{2x-5y=17 (+)

-2x+2x-5y-5y=13+17

-10y=30 /:(-10)

y=-3

2x-5y=17

2x-5*(-3)=17

2x+15=17

2x=2

x=1

Solution: (1; -3)

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