15=6-3r

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Solution for 15=6-3r equation:


Simplifying
15 = 6 + -3r

Solving
15 = 6 + -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.
15 + 3r = 6 + -3r + 3r

Combine like terms: -3r + 3r = 0
15 + 3r = 6 + 0
15 + 3r = 6

Add '-15' to each side of the equation.
15 + -15 + 3r = 6 + -15

Combine like terms: 15 + -15 = 0
0 + 3r = 6 + -15
3r = 6 + -15

Combine like terms: 6 + -15 = -9
3r = -9

Divide each side by '3'.
r = -3

Simplifying
r = -3

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