12=4(2r-1)

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Solution for 12=4(2r-1) equation:


Simplifying
12 = 4(2r + -1)

Reorder the terms:
12 = 4(-1 + 2r)
12 = (-1 * 4 + 2r * 4)
12 = (-4 + 8r)

Solving
12 = -4 + 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
12 + -8r = -4 + 8r + -8r

Combine like terms: 8r + -8r = 0
12 + -8r = -4 + 0
12 + -8r = -4

Add '-12' to each side of the equation.
12 + -12 + -8r = -4 + -12

Combine like terms: 12 + -12 = 0
0 + -8r = -4 + -12
-8r = -4 + -12

Combine like terms: -4 + -12 = -16
-8r = -16

Divide each side by '-8'.
r = 2

Simplifying
r = 2

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