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78=2w+3+w
We move all terms to the left:
78-(2w+3+w)=0
We add all the numbers together, and all the variables
-(3w+3)+78=0
We get rid of parentheses
-3w-3+78=0
We add all the numbers together, and all the variables
-3w+75=0
We move all terms containing w to the left, all other terms to the right
-3w=-75
w=-75/-3
w=+25
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