3x+6-x+15=4-9x-20+2x+30

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Solution for 3x+6-x+15=4-9x-20+2x+30 equation:


Simplifying
3x + 6 + -1x + 15 = 4 + -9x + -20 + 2x + 30

Reorder the terms:
6 + 15 + 3x + -1x = 4 + -9x + -20 + 2x + 30

Combine like terms: 6 + 15 = 21
21 + 3x + -1x = 4 + -9x + -20 + 2x + 30

Combine like terms: 3x + -1x = 2x
21 + 2x = 4 + -9x + -20 + 2x + 30

Reorder the terms:
21 + 2x = 4 + -20 + 30 + -9x + 2x

Combine like terms: 4 + -20 = -16
21 + 2x = -16 + 30 + -9x + 2x

Combine like terms: -16 + 30 = 14
21 + 2x = 14 + -9x + 2x

Combine like terms: -9x + 2x = -7x
21 + 2x = 14 + -7x

Solving
21 + 2x = 14 + -7x

Solving for variable 'x'.

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

Add '7x' to each side of the equation.
21 + 2x + 7x = 14 + -7x + 7x

Combine like terms: 2x + 7x = 9x
21 + 9x = 14 + -7x + 7x

Combine like terms: -7x + 7x = 0
21 + 9x = 14 + 0
21 + 9x = 14

Add '-21' to each side of the equation.
21 + -21 + 9x = 14 + -21

Combine like terms: 21 + -21 = 0
0 + 9x = 14 + -21
9x = 14 + -21

Combine like terms: 14 + -21 = -7
9x = -7

Divide each side by '9'.
x = -0.7777777778

Simplifying
x = -0.7777777778

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