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3-23x=-14(x-21)-15(x+3)
We move all terms to the left:
3-23x-(-14(x-21)-15(x+3))=0
We calculate terms in parentheses: -(-14(x-21)-15(x+3)), so:We get rid of parentheses
-14(x-21)-15(x+3)
We multiply parentheses
-14x-15x+294-45
We add all the numbers together, and all the variables
-29x+249
Back to the equation:
-(-29x+249)
-23x+29x-249+3=0
We add all the numbers together, and all the variables
6x-246=0
We move all terms containing x to the left, all other terms to the right
6x=246
x=246/6
x=41
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