Respuesta :

2x + 3x - 10 = 70

5x - 10 = 70

5x = 70 - 10

5x = 60

x = 60/5

x = 12

Now that we know the value of x,

the value of QSR = 3(12) - 10.

QSR = 36 - 10

QSR = 16

ANSWER: 16