7+2(5k+4)=-21-2k

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Solution for 7+2(5k+4)=-21-2k equation:


Simplifying
7 + 2(5k + 4) = -21 + -2k

Reorder the terms:
7 + 2(4 + 5k) = -21 + -2k
7 + (4 * 2 + 5k * 2) = -21 + -2k
7 + (8 + 10k) = -21 + -2k

Combine like terms: 7 + 8 = 15
15 + 10k = -21 + -2k

Solving
15 + 10k = -21 + -2k

Solving for variable 'k'.

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

Add '2k' to each side of the equation.
15 + 10k + 2k = -21 + -2k + 2k

Combine like terms: 10k + 2k = 12k
15 + 12k = -21 + -2k + 2k

Combine like terms: -2k + 2k = 0
15 + 12k = -21 + 0
15 + 12k = -21

Add '-15' to each side of the equation.
15 + -15 + 12k = -21 + -15

Combine like terms: 15 + -15 = 0
0 + 12k = -21 + -15
12k = -21 + -15

Combine like terms: -21 + -15 = -36
12k = -36

Divide each side by '12'.
k = -3

Simplifying
k = -3

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