9-r=3(r-5)

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Solution for 9-r=3(r-5) equation:


Simplifying
9 + -1r = 3(r + -5)

Reorder the terms:
9 + -1r = 3(-5 + r)
9 + -1r = (-5 * 3 + r * 3)
9 + -1r = (-15 + 3r)

Solving
9 + -1r = -15 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
9 + -1r + -3r = -15 + 3r + -3r

Combine like terms: -1r + -3r = -4r
9 + -4r = -15 + 3r + -3r

Combine like terms: 3r + -3r = 0
9 + -4r = -15 + 0
9 + -4r = -15

Add '-9' to each side of the equation.
9 + -9 + -4r = -15 + -9

Combine like terms: 9 + -9 = 0
0 + -4r = -15 + -9
-4r = -15 + -9

Combine like terms: -15 + -9 = -24
-4r = -24

Divide each side by '-4'.
r = 6

Simplifying
r = 6

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