2r+8=5r-13

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Solution for 2r+8=5r-13 equation:


Simplifying
2r + 8 = 5r + -13

Reorder the terms:
8 + 2r = 5r + -13

Reorder the terms:
8 + 2r = -13 + 5r

Solving
8 + 2r = -13 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
8 + 2r + -5r = -13 + 5r + -5r

Combine like terms: 2r + -5r = -3r
8 + -3r = -13 + 5r + -5r

Combine like terms: 5r + -5r = 0
8 + -3r = -13 + 0
8 + -3r = -13

Add '-8' to each side of the equation.
8 + -8 + -3r = -13 + -8

Combine like terms: 8 + -8 = 0
0 + -3r = -13 + -8
-3r = -13 + -8

Combine like terms: -13 + -8 = -21
-3r = -21

Divide each side by '-3'.
r = 7

Simplifying
r = 7

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