(r+3)-2(r+9)=

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Solution for (r+3)-2(r+9)= equation:


Simplifying
(r + 3) + -2(r + 9) = 0

Reorder the terms:
(3 + r) + -2(r + 9) = 0

Remove parenthesis around (3 + r)
3 + r + -2(r + 9) = 0

Reorder the terms:
3 + r + -2(9 + r) = 0
3 + r + (9 * -2 + r * -2) = 0
3 + r + (-18 + -2r) = 0

Reorder the terms:
3 + -18 + r + -2r = 0

Combine like terms: 3 + -18 = -15
-15 + r + -2r = 0

Combine like terms: r + -2r = -1r
-15 + -1r = 0

Solving
-15 + -1r = 0

Solving for variable 'r'.

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

Add '15' to each side of the equation.
-15 + 15 + -1r = 0 + 15

Combine like terms: -15 + 15 = 0
0 + -1r = 0 + 15
-1r = 0 + 15

Combine like terms: 0 + 15 = 15
-1r = 15

Divide each side by '-1'.
r = -15

Simplifying
r = -15

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