20=-8+9(r+3)

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Solution for 20=-8+9(r+3) equation:


Simplifying
20 = -8 + 9(r + 3)

Reorder the terms:
20 = -8 + 9(3 + r)
20 = -8 + (3 * 9 + r * 9)
20 = -8 + (27 + 9r)

Combine like terms: -8 + 27 = 19
20 = 19 + 9r

Solving
20 = 19 + 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
20 + -9r = 19 + 9r + -9r

Combine like terms: 9r + -9r = 0
20 + -9r = 19 + 0
20 + -9r = 19

Add '-20' to each side of the equation.
20 + -20 + -9r = 19 + -20

Combine like terms: 20 + -20 = 0
0 + -9r = 19 + -20
-9r = 19 + -20

Combine like terms: 19 + -20 = -1
-9r = -1

Divide each side by '-9'.
r = 0.1111111111

Simplifying
r = 0.1111111111

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