7r+7=21r+14

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Solution for 7r+7=21r+14 equation:


Simplifying
7r + 7 = 21r + 14

Reorder the terms:
7 + 7r = 21r + 14

Reorder the terms:
7 + 7r = 14 + 21r

Solving
7 + 7r = 14 + 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 + 7r + -21r = 14 + 21r + -21r

Combine like terms: 7r + -21r = -14r
7 + -14r = 14 + 21r + -21r

Combine like terms: 21r + -21r = 0
7 + -14r = 14 + 0
7 + -14r = 14

Add '-7' to each side of the equation.
7 + -7 + -14r = 14 + -7

Combine like terms: 7 + -7 = 0
0 + -14r = 14 + -7
-14r = 14 + -7

Combine like terms: 14 + -7 = 7
-14r = 7

Divide each side by '-14'.
r = -0.5

Simplifying
r = -0.5

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