3(4r+5)=51

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Solution for 3(4r+5)=51 equation:


Simplifying
3(4r + 5) = 51

Reorder the terms:
3(5 + 4r) = 51
(5 * 3 + 4r * 3) = 51
(15 + 12r) = 51

Solving
15 + 12r = 51

Solving for variable 'r'.

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

Add '-15' to each side of the equation.
15 + -15 + 12r = 51 + -15

Combine like terms: 15 + -15 = 0
0 + 12r = 51 + -15
12r = 51 + -15

Combine like terms: 51 + -15 = 36
12r = 36

Divide each side by '12'.
r = 3

Simplifying
r = 3

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