3+r+2(3+r)+r=57

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Solution for 3+r+2(3+r)+r=57 equation:



3+r+2(3+r)+r=57
We move all terms to the left:
3+r+2(3+r)+r-(57)=0
We add all the numbers together, and all the variables
r+2(r+3)+r+3-57=0
We add all the numbers together, and all the variables
2r+2(r+3)-54=0
We multiply parentheses
2r+2r+6-54=0
We add all the numbers together, and all the variables
4r-48=0
We move all terms containing r to the left, all other terms to the right
4r=48
r=48/4
r=12

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