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

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


Simplifying
3x(4) + -7x(3) + 12x + -9 = 0

Reorder the terms for easier multiplication:
3 * 4x + -7x(3) + 12x + -9 = 0

Multiply 3 * 4
12x + -7x(3) + 12x + -9 = 0

Reorder the terms for easier multiplication:
12x + -7 * 3x + 12x + -9 = 0

Multiply -7 * 3
12x + -21x + 12x + -9 = 0

Reorder the terms:
-9 + 12x + -21x + 12x = 0

Combine like terms: 12x + -21x = -9x
-9 + -9x + 12x = 0

Combine like terms: -9x + 12x = 3x
-9 + 3x = 0

Solving
-9 + 3x = 0

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 3x = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 3x = 0 + 9
3x = 0 + 9

Combine like terms: 0 + 9 = 9
3x = 9

Divide each side by '3'.
x = 3

Simplifying
x = 3

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