3(3r-4)=-20

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Solution for 3(3r-4)=-20 equation:


Simplifying
3(3r + -4) = -20

Reorder the terms:
3(-4 + 3r) = -20
(-4 * 3 + 3r * 3) = -20
(-12 + 9r) = -20

Solving
-12 + 9r = -20

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 + 9r = -20 + 12

Combine like terms: -12 + 12 = 0
0 + 9r = -20 + 12
9r = -20 + 12

Combine like terms: -20 + 12 = -8
9r = -8

Divide each side by '9'.
r = -0.8888888889

Simplifying
r = -0.8888888889

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