21+2r=91

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Solution for 21+2r=91 equation: 


Simplifying
21 + 2r = 91

Solving
21 + 2r = 91

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-21' to each side of the equation.
21 + -21 + 2r = 91 + -21

Combine like terms: 21 + -21 = 0
0 + 2r = 91 + -21
2r = 91 + -21

Combine like terms: 91 + -21 = 70
2r = 70

Divide each side by '2'.
r = 35

Simplifying
r = 35

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