6(2r-1)=90

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Solution for 6(2r-1)=90 equation: 


Simplifying
6(2r + -1) = 90

Reorder the terms:
6(-1 + 2r) = 90
(-1 * 6 + 2r * 6) = 90
(-6 + 12r) = 90

Solving
-6 + 12r = 90

Solving for variable 'r'.

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

Add '6' to each side of the equation.
-6 + 6 + 12r = 90 + 6

Combine like terms: -6 + 6 = 0
0 + 12r = 90 + 6
12r = 90 + 6

Combine like terms: 90 + 6 = 96
12r = 96

Divide each side by '12'.
r = 8

Simplifying
r = 8

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