3r-4+2r=9

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Solution for 3r-4+2r=9 equation: 


Simplifying
3r + -4 + 2r = 9

Reorder the terms:
-4 + 3r + 2r = 9

Combine like terms: 3r + 2r = 5r
-4 + 5r = 9

Solving
-4 + 5r = 9

Solving for variable 'r'.

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

Add '4' to each side of the equation.
-4 + 4 + 5r = 9 + 4

Combine like terms: -4 + 4 = 0
0 + 5r = 9 + 4
5r = 9 + 4

Combine like terms: 9 + 4 = 13
5r = 13

Divide each side by '5'.
r = 2.6

Simplifying
r = 2.6

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