4=r+13

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Solution for 4=r+13 equation:


Simplifying
4 = r + 13

Reorder the terms:
4 = 13 + r

Solving
4 = 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.
4 + -1r = 13 + r + -1r

Combine like terms: r + -1r = 0
4 + -1r = 13 + 0
4 + -1r = 13

Add '-4' to each side of the equation.
4 + -4 + -1r = 13 + -4

Combine like terms: 4 + -4 = 0
0 + -1r = 13 + -4
-1r = 13 + -4

Combine like terms: 13 + -4 = 9
-1r = 9

Divide each side by '-1'.
r = -9

Simplifying
r = -9

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