3(r-4)=(-57)

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Solution for 3(r-4)=(-57) equation:


Simplifying
3(r + -4) = (-57)

Reorder the terms:
3(-4 + r) = (-57)
(-4 * 3 + r * 3) = (-57)
(-12 + 3r) = (-57)
-12 + 3r = -57

Solving
-12 + 3r = -57

Solving for variable 'r'.

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

Add '12' to each side of the equation.
-12 + 12 + 3r = -57 + 12

Combine like terms: -12 + 12 = 0
0 + 3r = -57 + 12
3r = -57 + 12

Combine like terms: -57 + 12 = -45
3r = -45

Divide each side by '3'.
r = -15

Simplifying
r = -15

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