3r-9=6-r

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Solution for 3r-9=6-r equation:


Simplifying
3r + -9 = 6 + -1r

Reorder the terms:
-9 + 3r = 6 + -1r

Solving
-9 + 3r = 6 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
-9 + 3r + r = 6 + -1r + r

Combine like terms: 3r + r = 4r
-9 + 4r = 6 + -1r + r

Combine like terms: -1r + r = 0
-9 + 4r = 6 + 0
-9 + 4r = 6

Add '9' to each side of the equation.
-9 + 9 + 4r = 6 + 9

Combine like terms: -9 + 9 = 0
0 + 4r = 6 + 9
4r = 6 + 9

Combine like terms: 6 + 9 = 15
4r = 15

Divide each side by '4'.
r = 3.75

Simplifying
r = 3.75

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