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18*((1/3)*x-9) = -((1/3)*(1-(2*x)))-100*x-7 // + -((1/3)*(1-(2*x)))-100*x-7
18*((1/3)*x-9)+(1/3)*(1-(2*x))-(-100*x)+7 = 0
18*((1/3)*x-9)+(1/3)*(1-2*x)+100*x+7 = 0
18*(1/3*x-9)+1/3*(1-2*x)+100*x+7 = 0
18*(1/3*x-9)+1/3*(1-2*x)+100*x+7 = 0
16/3*x+100*x-485/3+7 = 0
316/3*x-485/3+7 = 0
316/3*x-464/3 = 0
316/3*x-464/3 = 0
316/3*x-464/3 = 0 // + 464/3
316/3*x = 464/3 // : 316/3
x = 464/3/316/3
x = 116/79
x = 116/79
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