7(1+3r)=

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Solution for 7(1+3r)= equation: 


Simplifying
7(1 + 3r) = 0
(1 * 7 + 3r * 7) = 0
(7 + 21r) = 0

Solving
7 + 21r = 0

Solving for variable 'r'.

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

Add '-7' to each side of the equation.
7 + -7 + 21r = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 21r = 0 + -7
21r = 0 + -7

Combine like terms: 0 + -7 = -7
21r = -7

Divide each side by '21'.
r = -0.3333333333

Simplifying
r = -0.3333333333

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