Question

×+y=15 2×+y=24 qual é o resultado pfvr☆

Answer 1

$\left \{ {{x+y=15} \atop {2x+y=24}} \right.$

x+y=15
x=15-y

2x+y= 24
2(15-y) + y = 24
30 -2y +y = 24
-y= 24-30
-y= -6 (-1)
y= 6

x=15-y
x=15-6
x=9