9=3-2r

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Solution for 9=3-2r equation:


Simplifying
9 = 3 + -2r

Solving
9 = 3 + -2r

Solving for variable 'r'.

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

Add '2r' to each side of the equation.
9 + 2r = 3 + -2r + 2r

Combine like terms: -2r + 2r = 0
9 + 2r = 3 + 0
9 + 2r = 3

Add '-9' to each side of the equation.
9 + -9 + 2r = 3 + -9

Combine like terms: 9 + -9 = 0
0 + 2r = 3 + -9
2r = 3 + -9

Combine like terms: 3 + -9 = -6
2r = -6

Divide each side by '2'.
r = -3

Simplifying
r = -3

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