x+21+4x=-15-4x-18

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Solution for x+21+4x=-15-4x-18 equation:


Simplifying
x + 21 + 4x = -15 + -4x + -18

Reorder the terms:
21 + x + 4x = -15 + -4x + -18

Combine like terms: x + 4x = 5x
21 + 5x = -15 + -4x + -18

Reorder the terms:
21 + 5x = -15 + -18 + -4x

Combine like terms: -15 + -18 = -33
21 + 5x = -33 + -4x

Solving
21 + 5x = -33 + -4x

Solving for variable 'x'.

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

Add '4x' to each side of the equation.
21 + 5x + 4x = -33 + -4x + 4x

Combine like terms: 5x + 4x = 9x
21 + 9x = -33 + -4x + 4x

Combine like terms: -4x + 4x = 0
21 + 9x = -33 + 0
21 + 9x = -33

Add '-21' to each side of the equation.
21 + -21 + 9x = -33 + -21

Combine like terms: 21 + -21 = 0
0 + 9x = -33 + -21
9x = -33 + -21

Combine like terms: -33 + -21 = -54
9x = -54

Divide each side by '9'.
x = -6

Simplifying
x = -6

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