26=r-(-13)

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Solution for 26=r-(-13) equation:


Simplifying
26 = r + -1(-13)

Multiply -1 * -13
26 = r + 13

Reorder the terms:
26 = 13 + r

Solving
26 = 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.
26 + -1r = 13 + r + -1r

Combine like terms: r + -1r = 0
26 + -1r = 13 + 0
26 + -1r = 13

Add '-26' to each side of the equation.
26 + -26 + -1r = 13 + -26

Combine like terms: 26 + -26 = 0
0 + -1r = 13 + -26
-1r = 13 + -26

Combine like terms: 13 + -26 = -13
-1r = -13

Divide each side by '-1'.
r = 13

Simplifying
r = 13

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