9(r+4)+12=-15

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Solution for 9(r+4)+12=-15 equation:


Simplifying
9(r + 4) + 12 = -15

Reorder the terms:
9(4 + r) + 12 = -15
(4 * 9 + r * 9) + 12 = -15
(36 + 9r) + 12 = -15

Reorder the terms:
36 + 12 + 9r = -15

Combine like terms: 36 + 12 = 48
48 + 9r = -15

Solving
48 + 9r = -15

Solving for variable 'r'.

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

Add '-48' to each side of the equation.
48 + -48 + 9r = -15 + -48

Combine like terms: 48 + -48 = 0
0 + 9r = -15 + -48
9r = -15 + -48

Combine like terms: -15 + -48 = -63
9r = -63

Divide each side by '9'.
r = -7

Simplifying
r = -7

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