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0.1(x+91)=-2(4-x)
We move all terms to the left:
0.1(x+91)-(-2(4-x))=0
We add all the numbers together, and all the variables
0.1(x+91)-(-2(-1x+4))=0
We multiply parentheses
0.1x-(-2(-1x+4))+9.1=0
We calculate terms in parentheses: -(-2(-1x+4)), so:We get rid of parentheses
-2(-1x+4)
We multiply parentheses
2x-8
Back to the equation:
-(2x-8)
0.1x-2x+8+9.1=0
We add all the numbers together, and all the variables
-1.9x+17.1=0
We move all terms containing x to the left, all other terms to the right
-1.9x=-17.1
x=-17.1/-1.9
x=9+3.5527136788E-15/1.9
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