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3.725+4.23x=3.9(2.16-78.3x)
We move all terms to the left:
3.725+4.23x-(3.9(2.16-78.3x))=0
We add all the numbers together, and all the variables
4.23x-(3.9(-78.3x+2.16))+3.725=0
We calculate terms in parentheses: -(3.9(-78.3x+2.16)), so:We get rid of parentheses
3.9(-78.3x+2.16)
We multiply parentheses
-304.2x+8.424
Back to the equation:
-(-304.2x+8.424)
4.23x+304.2x-8.424+3.725=0
We add all the numbers together, and all the variables
308.43x-4.699=0
We move all terms containing x to the left, all other terms to the right
308.43x=4.699
x=4.699/308.43
x=1/65.637369653118
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