Question

20 - 9w = 4(15 - w) solve for w​

Answer 1

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

Answer 2

w = -8

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