6=r-9

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Solution for 6=r-9 equation:


Simplifying
6 = r + -9

Reorder the terms:
6 = -9 + r

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

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

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

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

Combine like terms: -9 + -6 = -15
-1r = -15

Divide each side by '-1'.
r = 15

Simplifying
r = 15

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