81=-4x-7(-2x-3)

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Solution for 81=-4x-7(-2x-3) equation:


Simplifying
81 = -4x + -7(-2x + -3)

Reorder the terms:
81 = -4x + -7(-3 + -2x)
81 = -4x + (-3 * -7 + -2x * -7)
81 = -4x + (21 + 14x)

Reorder the terms:
81 = 21 + -4x + 14x

Combine like terms: -4x + 14x = 10x
81 = 21 + 10x

Solving
81 = 21 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
81 + -10x = 21 + 10x + -10x

Combine like terms: 10x + -10x = 0
81 + -10x = 21 + 0
81 + -10x = 21

Add '-81' to each side of the equation.
81 + -81 + -10x = 21 + -81

Combine like terms: 81 + -81 = 0
0 + -10x = 21 + -81
-10x = 21 + -81

Combine like terms: 21 + -81 = -60
-10x = -60

Divide each side by '-10'.
x = 6

Simplifying
x = 6

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