-(10+r)=-13

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Solution for -(10+r)=-13 equation: 


Simplifying
-1(10 + r) = -13
(10 * -1 + r * -1) = -13
(-10 + -1r) = -13

Solving
-10 + -1r = -13

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '10' to each side of the equation.
-10 + 10 + -1r = -13 + 10

Combine like terms: -10 + 10 = 0
0 + -1r = -13 + 10
-1r = -13 + 10

Combine like terms: -13 + 10 = -3
-1r = -3

Divide each side by '-1'.
r = 3

Simplifying
r = 3

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