5(r+20)=45

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Solution for 5(r+20)=45 equation:


Simplifying
5(r + 20) = 45

Reorder the terms:
5(20 + r) = 45
(20 * 5 + r * 5) = 45
(100 + 5r) = 45

Solving
100 + 5r = 45

Solving for variable 'r'.

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

Add '-100' to each side of the equation.
100 + -100 + 5r = 45 + -100

Combine like terms: 100 + -100 = 0
0 + 5r = 45 + -100
5r = 45 + -100

Combine like terms: 45 + -100 = -55
5r = -55

Divide each side by '5'.
r = -11

Simplifying
r = -11

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