3(4r-5)=45

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Solution for 3(4r-5)=45 equation: 


Simplifying
3(4r + -5) = 45

Reorder the terms:
3(-5 + 4r) = 45
(-5 * 3 + 4r * 3) = 45
(-15 + 12r) = 45

Solving
-15 + 12r = 45

Solving for variable 'r'.

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

Add '15' to each side of the equation.
-15 + 15 + 12r = 45 + 15

Combine like terms: -15 + 15 = 0
0 + 12r = 45 + 15
12r = 45 + 15

Combine like terms: 45 + 15 = 60
12r = 60

Divide each side by '12'.
r = 5

Simplifying
r = 5

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