1=9-2r

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Solution for 1=9-2r equation:


Simplifying
1 = 9 + -2r

Solving
1 = 9 + -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.
1 + 2r = 9 + -2r + 2r

Combine like terms: -2r + 2r = 0
1 + 2r = 9 + 0
1 + 2r = 9

Add '-1' to each side of the equation.
1 + -1 + 2r = 9 + -1

Combine like terms: 1 + -1 = 0
0 + 2r = 9 + -1
2r = 9 + -1

Combine like terms: 9 + -1 = 8
2r = 8

Divide each side by '2'.
r = 4

Simplifying
r = 4

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