5x-(x-3)=-21

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Solution for 5x-(x-3)=-21 equation:


Simplifying
5x + -1(x + -3) = -21

Reorder the terms:
5x + -1(-3 + x) = -21
5x + (-3 * -1 + x * -1) = -21
5x + (3 + -1x) = -21

Reorder the terms:
3 + 5x + -1x = -21

Combine like terms: 5x + -1x = 4x
3 + 4x = -21

Solving
3 + 4x = -21

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 + 4x = -21 + -3

Combine like terms: 3 + -3 = 0
0 + 4x = -21 + -3
4x = -21 + -3

Combine like terms: -21 + -3 = -24
4x = -24

Divide each side by '4'.
x = -6

Simplifying
x = -6

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