Question

encontre o valor de "x" e "y"

A ) × + 5 y = 30
3 ×-5 y= 10

Answer 1

{x+ 5 y = 30
{3x-5 y= 10
----------------
4x=40
x=10

x+ 5 y = 30
5y=30-10
y=20/5
y=4

S={10,4}

bons estudos :)