Question

x+2y=7 ×-2y=-5
Mim ajudem pfv❤❤❤

Answer 1

x+2y=7
x-2y=-5


x=7-2y
....
7-2y-2y=-5
7+5=4y
12=4y
12/4=y
3=y

x-2*3=-5
x=-5+6
x=1


Espero ter ajudado