7(3r+18)=12(2r-1)

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Solution for 7(3r+18)=12(2r-1) equation:


Simplifying
7(3r + 18) = 12(2r + -1)

Reorder the terms:
7(18 + 3r) = 12(2r + -1)
(18 * 7 + 3r * 7) = 12(2r + -1)
(126 + 21r) = 12(2r + -1)

Reorder the terms:
126 + 21r = 12(-1 + 2r)
126 + 21r = (-1 * 12 + 2r * 12)
126 + 21r = (-12 + 24r)

Solving
126 + 21r = -12 + 24r

Solving for variable 'r'.

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

Add '-24r' to each side of the equation.
126 + 21r + -24r = -12 + 24r + -24r

Combine like terms: 21r + -24r = -3r
126 + -3r = -12 + 24r + -24r

Combine like terms: 24r + -24r = 0
126 + -3r = -12 + 0
126 + -3r = -12

Add '-126' to each side of the equation.
126 + -126 + -3r = -12 + -126

Combine like terms: 126 + -126 = 0
0 + -3r = -12 + -126
-3r = -12 + -126

Combine like terms: -12 + -126 = -138
-3r = -138

Divide each side by '-3'.
r = 46

Simplifying
r = 46

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