Question

x+y=12
5x+y=32
respondam pf

Answer 1

x + y = 12 .(-1)
5x+y = 32

-x -y = -12
5x+y = 32
----------------

4x = 20
x = 20/4
x = 5

x+y = 12
5+y = 12
y = 12-5
y = 7

S: {5; 7}