3(4x+9)-2(7x-12)=81-3x

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Solution for 3(4x+9)-2(7x-12)=81-3x equation:


Simplifying
3(4x + 9) + -2(7x + -12) = 81 + -3x

Reorder the terms:
3(9 + 4x) + -2(7x + -12) = 81 + -3x
(9 * 3 + 4x * 3) + -2(7x + -12) = 81 + -3x
(27 + 12x) + -2(7x + -12) = 81 + -3x

Reorder the terms:
27 + 12x + -2(-12 + 7x) = 81 + -3x
27 + 12x + (-12 * -2 + 7x * -2) = 81 + -3x
27 + 12x + (24 + -14x) = 81 + -3x

Reorder the terms:
27 + 24 + 12x + -14x = 81 + -3x

Combine like terms: 27 + 24 = 51
51 + 12x + -14x = 81 + -3x

Combine like terms: 12x + -14x = -2x
51 + -2x = 81 + -3x

Solving
51 + -2x = 81 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
51 + -2x + 3x = 81 + -3x + 3x

Combine like terms: -2x + 3x = 1x
51 + 1x = 81 + -3x + 3x

Combine like terms: -3x + 3x = 0
51 + 1x = 81 + 0
51 + 1x = 81

Add '-51' to each side of the equation.
51 + -51 + 1x = 81 + -51

Combine like terms: 51 + -51 = 0
0 + 1x = 81 + -51
1x = 81 + -51

Combine like terms: 81 + -51 = 30
1x = 30

Divide each side by '1'.
x = 30

Simplifying
x = 30

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