Question

por favor gente me ajudem nessa.por favor
{x-y=10
2x+3y=10

Answer 1

x-y= 10
x= 10+y

2x+3y=10
2(10+y)+3y=10
20+2y+3y=10
20+5y=10
5y=10-20
5y=-10
y=-10/5
y=-2

x-y=10
x-(-2)=10
x+2=10
x=10-2
x=8