3(4r+5)+5(r-2)=

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Solution for 3(4r+5)+5(r-2)= equation:


Simplifying
3(4r + 5) + 5(r + -2) = 0

Reorder the terms:
3(5 + 4r) + 5(r + -2) = 0
(5 * 3 + 4r * 3) + 5(r + -2) = 0
(15 + 12r) + 5(r + -2) = 0

Reorder the terms:
15 + 12r + 5(-2 + r) = 0
15 + 12r + (-2 * 5 + r * 5) = 0
15 + 12r + (-10 + 5r) = 0

Reorder the terms:
15 + -10 + 12r + 5r = 0

Combine like terms: 15 + -10 = 5
5 + 12r + 5r = 0

Combine like terms: 12r + 5r = 17r
5 + 17r = 0

Solving
5 + 17r = 0

Solving for variable 'r'.

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

Add '-5' to each side of the equation.
5 + -5 + 17r = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 17r = 0 + -5
17r = 0 + -5

Combine like terms: 0 + -5 = -5
17r = -5

Divide each side by '17'.
r = -0.2941176471

Simplifying
r = -0.2941176471

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