Question

Resolva os sistemas
2×+y=12
×+3y=11

Answer 1

2x+y= 12 --> y=12-2x
x+3y=11--> x+3(12-2x)= 11
x+36-6x=11
-5x= 11-36
-5x= -25
x= 5
y=12-2(5)
y= 2