8=r+13

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Solution for 8=r+13 equation:


Simplifying
8 = r + 13

Reorder the terms:
8 = 13 + r

Solving
8 = 13 + 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.
8 + -1r = 13 + r + -1r

Combine like terms: r + -1r = 0
8 + -1r = 13 + 0
8 + -1r = 13

Add '-8' to each side of the equation.
8 + -8 + -1r = 13 + -8

Combine like terms: 8 + -8 = 0
0 + -1r = 13 + -8
-1r = 13 + -8

Combine like terms: 13 + -8 = 5
-1r = 5

Divide each side by '-1'.
r = -5

Simplifying
r = -5

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