-20=-3+5(r+9)

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Solution for -20=-3+5(r+9) equation:


Simplifying
-20 = -3 + 5(r + 9)

Reorder the terms:
-20 = -3 + 5(9 + r)
-20 = -3 + (9 * 5 + r * 5)
-20 = -3 + (45 + 5r)

Combine like terms: -3 + 45 = 42
-20 = 42 + 5r

Solving
-20 = 42 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
-20 + -5r = 42 + 5r + -5r

Combine like terms: 5r + -5r = 0
-20 + -5r = 42 + 0
-20 + -5r = 42

Add '20' to each side of the equation.
-20 + 20 + -5r = 42 + 20

Combine like terms: -20 + 20 = 0
0 + -5r = 42 + 20
-5r = 42 + 20

Combine like terms: 42 + 20 = 62
-5r = 62

Divide each side by '-5'.
r = -12.4

Simplifying
r = -12.4

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