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(5-x)3=7
We move all terms to the left:
(5-x)3-(7)=0
We add all the numbers together, and all the variables
(-1x+5)3-7=0
We multiply parentheses
-3x+15-7=0
We add all the numbers together, and all the variables
-3x+8=0
We move all terms containing x to the left, all other terms to the right
-3x=-8
x=-8/-3
x=2+2/3
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