20=2r+8

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Solution for 20=2r+8 equation:


Simplifying
20 = 2r + 8

Reorder the terms:
20 = 8 + 2r

Solving
20 = 8 + 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 = 8 + 2r + -2r

Combine like terms: 2r + -2r = 0
20 + -2r = 8 + 0
20 + -2r = 8

Add '-20' to each side of the equation.
20 + -20 + -2r = 8 + -20

Combine like terms: 20 + -20 = 0
0 + -2r = 8 + -20
-2r = 8 + -20

Combine like terms: 8 + -20 = -12
-2r = -12

Divide each side by '-2'.
r = 6

Simplifying
r = 6

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