r-2(r+1)=5r-20

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Solution for r-2(r+1)=5r-20 equation:


Simplifying
r + -2(r + 1) = 5r + -20

Reorder the terms:
r + -2(1 + r) = 5r + -20
r + (1 * -2 + r * -2) = 5r + -20
r + (-2 + -2r) = 5r + -20

Reorder the terms:
-2 + r + -2r = 5r + -20

Combine like terms: r + -2r = -1r
-2 + -1r = 5r + -20

Reorder the terms:
-2 + -1r = -20 + 5r

Solving
-2 + -1r = -20 + 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.
-2 + -1r + -5r = -20 + 5r + -5r

Combine like terms: -1r + -5r = -6r
-2 + -6r = -20 + 5r + -5r

Combine like terms: 5r + -5r = 0
-2 + -6r = -20 + 0
-2 + -6r = -20

Add '2' to each side of the equation.
-2 + 2 + -6r = -20 + 2

Combine like terms: -2 + 2 = 0
0 + -6r = -20 + 2
-6r = -20 + 2

Combine like terms: -20 + 2 = -18
-6r = -18

Divide each side by '-6'.
r = 3

Simplifying
r = 3

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