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-7+2x=5(4x+21)-x
We move all terms to the left:
-7+2x-(5(4x+21)-x)=0
We calculate terms in parentheses: -(5(4x+21)-x), so:We get rid of parentheses
5(4x+21)-x
We add all the numbers together, and all the variables
-1x+5(4x+21)
We multiply parentheses
-1x+20x+105
We add all the numbers together, and all the variables
19x+105
Back to the equation:
-(19x+105)
2x-19x-105-7=0
We add all the numbers together, and all the variables
-17x-112=0
We move all terms containing x to the left, all other terms to the right
-17x=112
x=112/-17
x=-6+10/17
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