9-3r=r-1

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Solution for 9-3r=r-1 equation:


Simplifying
9 + -3r = r + -1

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

Solving
9 + -3r = -1 + r

Solving for variable 'r'.

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

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

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

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

Add '-9' to each side of the equation.
9 + -9 + -4r = -1 + -9

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

Combine like terms: -1 + -9 = -10
-4r = -10

Divide each side by '-4'.
r = 2.5

Simplifying
r = 2.5

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