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.143(14r+28)=2(r+2)
We move all terms to the left:
.143(14r+28)-(2(r+2))=0
We multiply parentheses
2.002r-(2(r+2))+4.004=0
We calculate terms in parentheses: -(2(r+2)), so:We get rid of parentheses
2(r+2)
We multiply parentheses
2r+4
Back to the equation:
-(2r+4)
2.002r-2r-4+4.004=0
We add all the numbers together, and all the variables
0.0019999999999998r+0.0039999999999996=0
We move all terms containing r to the left, all other terms to the right
0.0019999999999998r=-0.0039999999999996
r=-0.0039999999999996/0.0019999999999998
r=-2
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