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

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Solution for 3x-(-x-1)=-15 equation:


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

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

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

Combine like terms: 3x + 1x = 4x
1 + 4x = -15

Solving
1 + 4x = -15

Solving for variable 'x'.

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

Add '-1' to each side of the equation.
1 + -1 + 4x = -15 + -1

Combine like terms: 1 + -1 = 0
0 + 4x = -15 + -1
4x = -15 + -1

Combine like terms: -15 + -1 = -16
4x = -16

Divide each side by '4'.
x = -4

Simplifying
x = -4

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