6x-(x-3)=18

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Solution for 6x-(x-3)=18 equation:


Simplifying
6x + -1(x + -3) = 18

Reorder the terms:
6x + -1(-3 + x) = 18
6x + (-3 * -1 + x * -1) = 18
6x + (3 + -1x) = 18

Reorder the terms:
3 + 6x + -1x = 18

Combine like terms: 6x + -1x = 5x
3 + 5x = 18

Solving
3 + 5x = 18

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 + 5x = 18 + -3

Combine like terms: 3 + -3 = 0
0 + 5x = 18 + -3
5x = 18 + -3

Combine like terms: 18 + -3 = 15
5x = 15

Divide each side by '5'.
x = 3

Simplifying
x = 3

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