20r+3r-18r-3r-2=8

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Solution for 20r+3r-18r-3r-2=8 equation:


Simplifying
20r + 3r + -18r + -3r + -2 = 8

Reorder the terms:
-2 + 20r + 3r + -18r + -3r = 8

Combine like terms: 20r + 3r = 23r
-2 + 23r + -18r + -3r = 8

Combine like terms: 23r + -18r = 5r
-2 + 5r + -3r = 8

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

Solving
-2 + 2r = 8

Solving for variable 'r'.

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

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

Combine like terms: -2 + 2 = 0
0 + 2r = 8 + 2
2r = 8 + 2

Combine like terms: 8 + 2 = 10
2r = 10

Divide each side by '2'.
r = 5

Simplifying
r = 5

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