(w-3)-5(w+7)=10(w+3)-(7w+5)

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w-3-5w-35=10w+30-7w-5, add the w's on both side: -4w-38=3w+25, +4w to both sides: -38=7w+25, subtract 25 on both sides: -63=7w, solve for w: answer is: -9