15r-4(-7)-72=3r

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Solution for 15r-4(-7)-72=3r equation:


Simplifying
15r + -4(-7) + -72 = 3r

Multiply -4 * -7
15r + 28 + -72 = 3r

Reorder the terms:
28 + -72 + 15r = 3r

Combine like terms: 28 + -72 = -44
-44 + 15r = 3r

Solving
-44 + 15r = 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
-44 + 15r + -3r = 3r + -3r

Combine like terms: 15r + -3r = 12r
-44 + 12r = 3r + -3r

Combine like terms: 3r + -3r = 0
-44 + 12r = 0

Add '44' to each side of the equation.
-44 + 44 + 12r = 0 + 44

Combine like terms: -44 + 44 = 0
0 + 12r = 0 + 44
12r = 0 + 44

Combine like terms: 0 + 44 = 44
12r = 44

Divide each side by '12'.
r = 3.666666667

Simplifying
r = 3.666666667

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