Question

5х+2у=17
-10х+у=-29

Answer 1

ответ: (x,y)=(3,2)

1)  5x+2y=17  = 5x+2y=17

-10x+y=-29       y=-29+10x

5x+2(-29+10x)=17

5x-58+20x=17

25x=75

x=3

5*3+2y=17

15+2y=17

2y=17-15

y=1