20=2(r+7)

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Solution for 20=2(r+7) equation:


Simplifying
20 = 2(r + 7)

Reorder the terms:
20 = 2(7 + r)
20 = (7 * 2 + r * 2)
20 = (14 + 2r)

Solving
20 = 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.
20 + -2r = 14 + 2r + -2r

Combine like terms: 2r + -2r = 0
20 + -2r = 14 + 0
20 + -2r = 14

Add '-20' to each side of the equation.
20 + -20 + -2r = 14 + -20

Combine like terms: 20 + -20 = 0
0 + -2r = 14 + -20
-2r = 14 + -20

Combine like terms: 14 + -20 = -6
-2r = -6

Divide each side by '-2'.
r = 3

Simplifying
r = 3

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