7r-21=14+2r

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Solution for 7r-21=14+2r equation:


Simplifying
7r + -21 = 14 + 2r

Reorder the terms:
-21 + 7r = 14 + 2r

Solving
-21 + 7r = 14 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
-21 + 7r + -2r = 14 + 2r + -2r

Combine like terms: 7r + -2r = 5r
-21 + 5r = 14 + 2r + -2r

Combine like terms: 2r + -2r = 0
-21 + 5r = 14 + 0
-21 + 5r = 14

Add '21' to each side of the equation.
-21 + 21 + 5r = 14 + 21

Combine like terms: -21 + 21 = 0
0 + 5r = 14 + 21
5r = 14 + 21

Combine like terms: 14 + 21 = 35
5r = 35

Divide each side by '5'.
r = 7

Simplifying
r = 7

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