Answer :

[tex]5(9-3)=9w-5*3 \\\\ 5*6=9w-15 \\\\ 30=9w-15 \\\\ 30+15=9w \\\\ 45=9w \ |:9 \\\\ \boxed{w=5}[/tex]
5 (9 - 3) = w × 9 - 5 × 3       :First, distribute on the left side

45 - 15 = w × 9 - 5 × 3        :Then, take 45 - 15 on the left side and - 5 × 3 (Because                                              of PEMDAS)

30 = w × 9 - 15                   :Next, take 9 - 15

(30 = w × -6) ÷ -6                :Then, divide the equation by -6.

-5 = w