2r-90=10

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Solution for 2r-90=10 equation: 



2r-90=10

We move all terms to the left:

2r-90-(10)=0

We add all the numbers together, and all the variables

2r-100=0

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

2r=100

r=100/2

r=50

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