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I'm going to assume that you have to solve for 'w'

Expand the brackets first:

-3 = 3w + 3w - 15

Simplify:

-3 = 6w - 15

Add 15 to both sides:

12 = 6w

Divide both sides by 6 to get the answer:

w = 2

Hope This Helps You!

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S1NGH

Answer:

w=2

Step-by-step explanation:

-3=3w+3(w-5)

-3=3w+3w-15

-3=6w-15

12=6w

w=2