9=r+11

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Solution for 9=r+11 equation:


Simplifying
9 = r + 11

Reorder the terms:
9 = 11 + r

Solving
9 = 11 + 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 + -1r = 11 + r + -1r

Combine like terms: r + -1r = 0
9 + -1r = 11 + 0
9 + -1r = 11

Add '-9' to each side of the equation.
9 + -9 + -1r = 11 + -9

Combine like terms: 9 + -9 = 0
0 + -1r = 11 + -9
-1r = 11 + -9

Combine like terms: 11 + -9 = 2
-1r = 2

Divide each side by '-1'.
r = -2

Simplifying
r = -2

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