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82+(8x+4)=158
We move all terms to the left:
82+(8x+4)-(158)=0
We add all the numbers together, and all the variables
(8x+4)-76=0
We get rid of parentheses
8x+4-76=0
We add all the numbers together, and all the variables
8x-72=0
We move all terms containing x to the left, all other terms to the right
8x=72
x=72/8
x=9
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