21=6(5r-2)

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Solution for 21=6(5r-2) equation:


Simplifying
21 = 6(5r + -2)

Reorder the terms:
21 = 6(-2 + 5r)
21 = (-2 * 6 + 5r * 6)
21 = (-12 + 30r)

Solving
21 = -12 + 30r

Solving for variable 'r'.

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

Add '-30r' to each side of the equation.
21 + -30r = -12 + 30r + -30r

Combine like terms: 30r + -30r = 0
21 + -30r = -12 + 0
21 + -30r = -12

Add '-21' to each side of the equation.
21 + -21 + -30r = -12 + -21

Combine like terms: 21 + -21 = 0
0 + -30r = -12 + -21
-30r = -12 + -21

Combine like terms: -12 + -21 = -33
-30r = -33

Divide each side by '-30'.
r = 1.1

Simplifying
r = 1.1

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