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180(-x-20)=3x
We move all terms to the left:
180(-x-20)-(3x)=0
We add all the numbers together, and all the variables
180(-1x-20)-3x=0
We add all the numbers together, and all the variables
-3x+180(-1x-20)=0
We multiply parentheses
-3x-180x-3600=0
We add all the numbers together, and all the variables
-183x-3600=0
We move all terms containing x to the left, all other terms to the right
-183x=3600
x=3600/-183
x=-19+41/61
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