7(7+2r)=91

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Solution for 7(7+2r)=91 equation: 


Simplifying
7(7 + 2r) = 91
(7 * 7 + 2r * 7) = 91
(49 + 14r) = 91

Solving
49 + 14r = 91

Solving for variable 'r'.

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

Add '-49' to each side of the equation.
49 + -49 + 14r = 91 + -49

Combine like terms: 49 + -49 = 0
0 + 14r = 91 + -49
14r = 91 + -49

Combine like terms: 91 + -49 = 42
14r = 42

Divide each side by '14'.
r = 3

Simplifying
r = 3

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