3r+12+(-8r)+210=180

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Solution for 3r+12+(-8r)+210=180 equation:


Simplifying
3r + 12 + (-8r) + 210 = 180

Reorder the terms:
12 + 210 + 3r + (-8r) = 180

Combine like terms: 12 + 210 = 222
222 + 3r + (-8r) = 180

Combine like terms: 3r + (-8r) = -5r
222 + -5r = 180

Solving
222 + -5r = 180

Solving for variable 'r'.

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

Add '-222' to each side of the equation.
222 + -222 + -5r = 180 + -222

Combine like terms: 222 + -222 = 0
0 + -5r = 180 + -222
-5r = 180 + -222

Combine like terms: 180 + -222 = -42
-5r = -42

Divide each side by '-5'.
r = 8.4

Simplifying
r = 8.4

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