Respuesta :

NO 7

9w − 7 = 3w + 23

9w - 3w = 23 + 7

6w = 30

w = 30/6

w = 5

NO 8

(5 − 6t) = 5t + 7

-6t - 5t = 7 - 5

-11t = 2

t = - 2/11