3x+21=-1x-51

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Solution for 3x+21=-1x-51 equation:


Simplifying
3x + 21 = -1x + -51

Reorder the terms:
21 + 3x = -1x + -51

Reorder the terms:
21 + 3x = -51 + -1x

Solving
21 + 3x = -51 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
21 + 3x + x = -51 + -1x + x

Combine like terms: 3x + x = 4x
21 + 4x = -51 + -1x + x

Combine like terms: -1x + x = 0
21 + 4x = -51 + 0
21 + 4x = -51

Add '-21' to each side of the equation.
21 + -21 + 4x = -51 + -21

Combine like terms: 21 + -21 = 0
0 + 4x = -51 + -21
4x = -51 + -21

Combine like terms: -51 + -21 = -72
4x = -72

Divide each side by '4'.
x = -18

Simplifying
x = -18

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