The answer to your question is w= 15 because you multiply both sides of the equation by 3 in order to single out the w and you would get 15.
Isolate the w
w/3 = 5
Note the equal sign. What you do to one side, you do to the other.
Multiply 3 to both sides
w/3(3) = 5(3)
w = 5(3)
Multiply
w = 15
15 is your answer for w
hope this helps
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