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^2-15=R+19
We move all terms to the left:
^2-15-(R+19)=0
We add all the numbers together, and all the variables
-(R+19)=0
We get rid of parentheses
-R-19=0
We add all the numbers together, and all the variables
-1R-19=0
We move all terms containing R to the left, all other terms to the right
-R=19
R=19/-1
R=-19
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