15-4(3r+5)=

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Solution for 15-4(3r+5)= equation:


Simplifying
15 + -4(3r + 5) = 0

Reorder the terms:
15 + -4(5 + 3r) = 0
15 + (5 * -4 + 3r * -4) = 0
15 + (-20 + -12r) = 0

Combine like terms: 15 + -20 = -5
-5 + -12r = 0

Solving
-5 + -12r = 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 + -12r = 0 + 5

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

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

Divide each side by '-12'.
r = -0.4166666667

Simplifying
r = -0.4166666667

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