3x-(x-3)=15

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Solution for 3x-(x-3)=15 equation:


Simplifying
3x + -1(x + -3) = 15

Reorder the terms:
3x + -1(-3 + x) = 15
3x + (-3 * -1 + x * -1) = 15
3x + (3 + -1x) = 15

Reorder the terms:
3 + 3x + -1x = 15

Combine like terms: 3x + -1x = 2x
3 + 2x = 15

Solving
3 + 2x = 15

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 = 15 + -3

Combine like terms: 3 + -3 = 0
0 + 2x = 15 + -3
2x = 15 + -3

Combine like terms: 15 + -3 = 12
2x = 12

Divide each side by '2'.
x = 6

Simplifying
x = 6

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