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23x-28=7x+4(4x-7)
We move all terms to the left:
23x-28-(7x+4(4x-7))=0
We calculate terms in parentheses: -(7x+4(4x-7)), so:We get rid of parentheses
7x+4(4x-7)
We multiply parentheses
7x+16x-28
We add all the numbers together, and all the variables
23x-28
Back to the equation:
-(23x-28)
23x-23x+28-28=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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