-5(-3.4k-7)+(3k+21)=

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Solution for -5(-3.4k-7)+(3k+21)= equation:


Simplifying
-5(-3.4k + -7) + (3k + 21) = 0

Reorder the terms:
-5(-7 + -3.4k) + (3k + 21) = 0
(-7 * -5 + -3.4k * -5) + (3k + 21) = 0
(35 + 17k) + (3k + 21) = 0

Reorder the terms:
35 + 17k + (21 + 3k) = 0

Remove parenthesis around (21 + 3k)
35 + 17k + 21 + 3k = 0

Reorder the terms:
35 + 21 + 17k + 3k = 0

Combine like terms: 35 + 21 = 56
56 + 17k + 3k = 0

Combine like terms: 17k + 3k = 20k
56 + 20k = 0

Solving
56 + 20k = 0

Solving for variable 'k'.

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

Add '-56' to each side of the equation.
56 + -56 + 20k = 0 + -56

Combine like terms: 56 + -56 = 0
0 + 20k = 0 + -56
20k = 0 + -56

Combine like terms: 0 + -56 = -56
20k = -56

Divide each side by '20'.
k = -2.8

Simplifying
k = -2.8

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