81=3x+3(-4x+9)

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Solution for 81=3x+3(-4x+9) equation:


Simplifying
81 = 3x + 3(-4x + 9)

Reorder the terms:
81 = 3x + 3(9 + -4x)
81 = 3x + (9 * 3 + -4x * 3)
81 = 3x + (27 + -12x)

Reorder the terms:
81 = 27 + 3x + -12x

Combine like terms: 3x + -12x = -9x
81 = 27 + -9x

Solving
81 = 27 + -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
81 + 9x = 27 + -9x + 9x

Combine like terms: -9x + 9x = 0
81 + 9x = 27 + 0
81 + 9x = 27

Add '-81' to each side of the equation.
81 + -81 + 9x = 27 + -81

Combine like terms: 81 + -81 = 0
0 + 9x = 27 + -81
9x = 27 + -81

Combine like terms: 27 + -81 = -54
9x = -54

Divide each side by '9'.
x = -6

Simplifying
x = -6

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