4(r-1)=2(r+1)

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Solution for 4(r-1)=2(r+1) equation:



4(r-1)=2(r+1)
We move all terms to the left:
4(r-1)-(2(r+1))=0
We multiply parentheses
4r-(2(r+1))-4=0
We calculate terms in parentheses: -(2(r+1)), so:
2(r+1)
We multiply parentheses
2r+2
Back to the equation:
-(2r+2)
We get rid of parentheses
4r-2r-2-4=0
We add all the numbers together, and all the variables
2r-6=0
We move all terms containing r to the left, all other terms to the right
2r=6
r=6/2
r=3

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