Question

x+y=2
x-y=12
cat e x cat e y​

Answer 1

Răspuns:

x=6

y=-4

Explicație pas cu pas:

x+y=2 =>x=2-y

x-y=10=> 2-y-y=10=>2-2y=10

-2y=10-2

-2y=8

y=8/-2

y=-4