Question

Besolva os sistemas:
a) [3x + 2y = 58
x+y =23
quanto vale x e y​

Answer 1

$x+y=23\\x=23-y\\3x+2y=58\\3.(32-y)+2y=58\\96-3y+2y=58\\96-y=58\\-y=58-96\\-y=-38 (.-1)\\y=38$