R+2(1+x)=12

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Solution for R+2(1+x)=12 equation: 



+2(1+R)=12

We move all terms to the left:

+2(1+R)-(12)=0

We add all the numbers together, and all the variables

2(R+1)-12=0

We multiply parentheses

2R+2-12=0

We add all the numbers together, and all the variables

2R-10=0

We move all terms containing R to the left, all other terms to the right

2R=10

R=10/2

R=5

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