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85=4x+19
We move all terms to the left:
85-(4x+19)=0
We get rid of parentheses
-4x-19+85=0
We add all the numbers together, and all the variables
-4x+66=0
We move all terms containing x to the left, all other terms to the right
-4x=-66
x=-66/-4
x=16+1/2
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