Respuesta :

Answer:

w = -8

Step-by-step explanation:

  step 1:(20 - 9w) -  4 • (15 - w)  = 0

step 2:   -5w - 40  =   -5 • (w + 8)

 step 3:   -5 • (w + 8)  = 0

 step 4:  Subtract  8  from both sides of the equation :

                     w = -8

licia01
20-9w=4(15-w)
20-9w=60-4w
+9w +9w
20 = 60+5w
-60 -60
-40=5w
Divide by 5 on both sides to get w alone.
-8 = w