Question

Hallar x. Y
X+Y=7
X-Y =-3

Ayúdenme por fabor

Answer 1

X+Y=7 X-Y=3

(x+y) + (x-1y) = (7) + (3)

(1x+1x) (1y+(-1)y) = 7+3

2x + 0y= 10

2x=10

X= 10
– 2x
2

X=5