2(k+9)-(-3k-3)=4k

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Solution for 2(k+9)-(-3k-3)=4k equation:


Simplifying
2(k + 9) + -1(-3k + -3) = 4k

Reorder the terms:
2(9 + k) + -1(-3k + -3) = 4k
(9 * 2 + k * 2) + -1(-3k + -3) = 4k
(18 + 2k) + -1(-3k + -3) = 4k

Reorder the terms:
18 + 2k + -1(-3 + -3k) = 4k
18 + 2k + (-3 * -1 + -3k * -1) = 4k
18 + 2k + (3 + 3k) = 4k

Reorder the terms:
18 + 3 + 2k + 3k = 4k

Combine like terms: 18 + 3 = 21
21 + 2k + 3k = 4k

Combine like terms: 2k + 3k = 5k
21 + 5k = 4k

Solving
21 + 5k = 4k

Solving for variable 'k'.

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

Add '-4k' to each side of the equation.
21 + 5k + -4k = 4k + -4k

Combine like terms: 5k + -4k = 1k
21 + 1k = 4k + -4k

Combine like terms: 4k + -4k = 0
21 + 1k = 0

Add '-21' to each side of the equation.
21 + -21 + 1k = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 1k = 0 + -21
1k = 0 + -21

Combine like terms: 0 + -21 = -21
1k = -21

Divide each side by '1'.
k = -21

Simplifying
k = -21

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