20+r=r-2(3r+3)

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Solution for 20+r=r-2(3r+3) equation:


Simplifying
20 + r = r + -2(3r + 3)

Reorder the terms:
20 + r = r + -2(3 + 3r)
20 + r = r + (3 * -2 + 3r * -2)
20 + r = r + (-6 + -6r)

Reorder the terms:
20 + r = -6 + r + -6r

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

Solving
20 + r = -6 + -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.
20 + r + 5r = -6 + -5r + 5r

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

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

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

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

Combine like terms: -6 + -20 = -26
6r = -26

Divide each side by '6'.
r = -4.333333333

Simplifying
r = -4.333333333

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