3=13-2r

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Solution for 3=13-2r equation:


Simplifying
3 = 13 + -2r

Solving
3 = 13 + -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.
3 + 2r = 13 + -2r + 2r

Combine like terms: -2r + 2r = 0
3 + 2r = 13 + 0
3 + 2r = 13

Add '-3' to each side of the equation.
3 + -3 + 2r = 13 + -3

Combine like terms: 3 + -3 = 0
0 + 2r = 13 + -3
2r = 13 + -3

Combine like terms: 13 + -3 = 10
2r = 10

Divide each side by '2'.
r = 5

Simplifying
r = 5

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