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-77x+28=12+99x
We move all terms to the left:
-77x+28-(12+99x)=0
We add all the numbers together, and all the variables
-77x-(99x+12)+28=0
We get rid of parentheses
-77x-99x-12+28=0
We add all the numbers together, and all the variables
-176x+16=0
We move all terms containing x to the left, all other terms to the right
-176x=-16
x=-16/-176
x=1/11
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