84=-10(7+10k)-6(1-10k)

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Solution for 84=-10(7+10k)-6(1-10k) equation:


Simplifying
84 = -10(7 + 10k) + -6(1 + -10k)
84 = (7 * -10 + 10k * -10) + -6(1 + -10k)
84 = (-70 + -100k) + -6(1 + -10k)
84 = -70 + -100k + (1 * -6 + -10k * -6)
84 = -70 + -100k + (-6 + 60k)

Reorder the terms:
84 = -70 + -6 + -100k + 60k

Combine like terms: -70 + -6 = -76
84 = -76 + -100k + 60k

Combine like terms: -100k + 60k = -40k
84 = -76 + -40k

Solving
84 = -76 + -40k

Solving for variable 'k'.

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

Add '40k' to each side of the equation.
84 + 40k = -76 + -40k + 40k

Combine like terms: -40k + 40k = 0
84 + 40k = -76 + 0
84 + 40k = -76

Add '-84' to each side of the equation.
84 + -84 + 40k = -76 + -84

Combine like terms: 84 + -84 = 0
0 + 40k = -76 + -84
40k = -76 + -84

Combine like terms: -76 + -84 = -160
40k = -160

Divide each side by '40'.
k = -4

Simplifying
k = -4

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