7(1+6r)=-21

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Solution for 7(1+6r)=-21 equation: 


Simplifying
7(1 + 6r) = -21
(1 * 7 + 6r * 7) = -21
(7 + 42r) = -21

Solving
7 + 42r = -21

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 + 42r = -21 + -7

Combine like terms: 7 + -7 = 0
0 + 42r = -21 + -7
42r = -21 + -7

Combine like terms: -21 + -7 = -28
42r = -28

Divide each side by '42'.
r = -0.6666666667

Simplifying
r = -0.6666666667

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