3r-9+8r=28

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Solution for 3r-9+8r=28 equation:


Simplifying
3r + -9 + 8r = 28

Reorder the terms:
-9 + 3r + 8r = 28

Combine like terms: 3r + 8r = 11r
-9 + 11r = 28

Solving
-9 + 11r = 28

Solving for variable 'r'.

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

Add '9' to each side of the equation.
-9 + 9 + 11r = 28 + 9

Combine like terms: -9 + 9 = 0
0 + 11r = 28 + 9
11r = 28 + 9

Combine like terms: 28 + 9 = 37
11r = 37

Divide each side by '11'.
r = 3.363636364

Simplifying
r = 3.363636364

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