-3(1+7r)=51-12r

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Solution for -3(1+7r)=51-12r equation:


Simplifying
-3(1 + 7r) = 51 + -12r
(1 * -3 + 7r * -3) = 51 + -12r
(-3 + -21r) = 51 + -12r

Solving
-3 + -21r = 51 + -12r

Solving for variable 'r'.

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

Add '12r' to each side of the equation.
-3 + -21r + 12r = 51 + -12r + 12r

Combine like terms: -21r + 12r = -9r
-3 + -9r = 51 + -12r + 12r

Combine like terms: -12r + 12r = 0
-3 + -9r = 51 + 0
-3 + -9r = 51

Add '3' to each side of the equation.
-3 + 3 + -9r = 51 + 3

Combine like terms: -3 + 3 = 0
0 + -9r = 51 + 3
-9r = 51 + 3

Combine like terms: 51 + 3 = 54
-9r = 54

Divide each side by '-9'.
r = -6

Simplifying
r = -6

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