18=-3(r+4)

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Solution for 18=-3(r+4) equation:


Simplifying
18 = -3(r + 4)

Reorder the terms:
18 = -3(4 + r)
18 = (4 * -3 + r * -3)
18 = (-12 + -3r)

Solving
18 = -12 + -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.
18 + 3r = -12 + -3r + 3r

Combine like terms: -3r + 3r = 0
18 + 3r = -12 + 0
18 + 3r = -12

Add '-18' to each side of the equation.
18 + -18 + 3r = -12 + -18

Combine like terms: 18 + -18 = 0
0 + 3r = -12 + -18
3r = -12 + -18

Combine like terms: -12 + -18 = -30
3r = -30

Divide each side by '3'.
r = -10

Simplifying
r = -10

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