4(x+3)-x=-9

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


Simplifying
4(x + 3) + -1x = -9

Reorder the terms:
4(3 + x) + -1x = -9
(3 * 4 + x * 4) + -1x = -9
(12 + 4x) + -1x = -9

Combine like terms: 4x + -1x = 3x
12 + 3x = -9

Solving
12 + 3x = -9

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 3x = -9 + -12

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

Combine like terms: -9 + -12 = -21
3x = -21

Divide each side by '3'.
x = -7

Simplifying
x = -7

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