r-(2r-8)=13

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Solution for r-(2r-8)=13 equation:


Simplifying
r + -1(2r + -8) = 13

Reorder the terms:
r + -1(-8 + 2r) = 13
r + (-8 * -1 + 2r * -1) = 13
r + (8 + -2r) = 13

Reorder the terms:
8 + r + -2r = 13

Combine like terms: r + -2r = -1r
8 + -1r = 13

Solving
8 + -1r = 13

Solving for variable 'r'.

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

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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