21r-7=6+6r

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Solution for 21r-7=6+6r equation:


Simplifying
21r + -7 = 6 + 6r

Reorder the terms:
-7 + 21r = 6 + 6r

Solving
-7 + 21r = 6 + 6r

Solving for variable 'r'.

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

Add '-6r' to each side of the equation.
-7 + 21r + -6r = 6 + 6r + -6r

Combine like terms: 21r + -6r = 15r
-7 + 15r = 6 + 6r + -6r

Combine like terms: 6r + -6r = 0
-7 + 15r = 6 + 0
-7 + 15r = 6

Add '7' to each side of the equation.
-7 + 7 + 15r = 6 + 7

Combine like terms: -7 + 7 = 0
0 + 15r = 6 + 7
15r = 6 + 7

Combine like terms: 6 + 7 = 13
15r = 13

Divide each side by '15'.
r = 0.8666666667

Simplifying
r = 0.8666666667

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