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149=3x-7(1-7x)
We move all terms to the left:
149-(3x-7(1-7x))=0
We add all the numbers together, and all the variables
-(3x-7(-7x+1))+149=0
We calculate terms in parentheses: -(3x-7(-7x+1)), so:We get rid of parentheses
3x-7(-7x+1)
We multiply parentheses
3x+49x-7
We add all the numbers together, and all the variables
52x-7
Back to the equation:
-(52x-7)
-52x+7+149=0
We add all the numbers together, and all the variables
-52x+156=0
We move all terms containing x to the left, all other terms to the right
-52x=-156
x=-156/-52
x=+3
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