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4x+7x+7+7x+7=180
We move all terms to the left:
4x+7x+7+7x+7-(180)=0
We add all the numbers together, and all the variables
18x-166=0
We move all terms containing x to the left, all other terms to the right
18x=166
x=166/18
x=9+2/9
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