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216=64+8x
We move all terms to the left:
216-(64+8x)=0
We add all the numbers together, and all the variables
-(8x+64)+216=0
We get rid of parentheses
-8x-64+216=0
We add all the numbers together, and all the variables
-8x+152=0
We move all terms containing x to the left, all other terms to the right
-8x=-152
x=-152/-8
x=+19
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