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8(3-x)/7=-x
We move all terms to the left:
8(3-x)/7-(-x)=0
We add all the numbers together, and all the variables
8(-1x+3)/7-(-1x)=0
We get rid of parentheses
8(-1x+3)/7+1x=0
We multiply all the terms by the denominator
8(-1x+3)+1x*7=0
We multiply parentheses
-8x+1x*7+24=0
Wy multiply elements
-8x+7x+24=0
We add all the numbers together, and all the variables
-1x+24=0
We move all terms containing x to the left, all other terms to the right
-x=-24
x=-24/-1
x=+24
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