6r+7=21r+12

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Solution for 6r+7=21r+12 equation:


Simplifying
6r + 7 = 21r + 12

Reorder the terms:
7 + 6r = 21r + 12

Reorder the terms:
7 + 6r = 12 + 21r

Solving
7 + 6r = 12 + 21r

Solving for variable 'r'.

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

Add '-21r' to each side of the equation.
7 + 6r + -21r = 12 + 21r + -21r

Combine like terms: 6r + -21r = -15r
7 + -15r = 12 + 21r + -21r

Combine like terms: 21r + -21r = 0
7 + -15r = 12 + 0
7 + -15r = 12

Add '-7' to each side of the equation.
7 + -7 + -15r = 12 + -7

Combine like terms: 7 + -7 = 0
0 + -15r = 12 + -7
-15r = 12 + -7

Combine like terms: 12 + -7 = 5
-15r = 5

Divide each side by '-15'.
r = -0.3333333333

Simplifying
r = -0.3333333333

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