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

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Solution for (3x-1)-(x-4)=9 equation:


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

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

Remove parenthesis around (-1 + 3x)
-1 + 3x + -1(x + -4) = 9

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

Reorder the terms:
-1 + 4 + 3x + -1x = 9

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

Combine like terms: 3x + -1x = 2x
3 + 2x = 9

Solving
3 + 2x = 9

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 2x = 9 + -3

Combine like terms: 3 + -3 = 0
0 + 2x = 9 + -3
2x = 9 + -3

Combine like terms: 9 + -3 = 6
2x = 6

Divide each side by '2'.
x = 3

Simplifying
x = 3

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