x+21-3=-2x-3

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Solution for x+21-3=-2x-3 equation:


Simplifying
x + 21 + -3 = -2x + -3

Reorder the terms:
21 + -3 + x = -2x + -3

Combine like terms: 21 + -3 = 18
18 + x = -2x + -3

Reorder the terms:
18 + x = -3 + -2x

Solving
18 + x = -3 + -2x

Solving for variable 'x'.

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

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

Combine like terms: x + 2x = 3x
18 + 3x = -3 + -2x + 2x

Combine like terms: -2x + 2x = 0
18 + 3x = -3 + 0
18 + 3x = -3

Add '-18' to each side of the equation.
18 + -18 + 3x = -3 + -18

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

Combine like terms: -3 + -18 = -21
3x = -21

Divide each side by '3'.
x = -7

Simplifying
x = -7

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