9=(31-x-3x+4)

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Solution for 9=(31-x-3x+4) equation:


Simplifying
9 = (31 + -1x + -3x + 4)

Reorder the terms:
9 = (31 + 4 + -1x + -3x)

Combine like terms: 31 + 4 = 35
9 = (35 + -1x + -3x)

Combine like terms: -1x + -3x = -4x
9 = (35 + -4x)

Remove parenthesis around (35 + -4x)
9 = 35 + -4x

Solving
9 = 35 + -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.
9 + 4x = 35 + -4x + 4x

Combine like terms: -4x + 4x = 0
9 + 4x = 35 + 0
9 + 4x = 35

Add '-9' to each side of the equation.
9 + -9 + 4x = 35 + -9

Combine like terms: 9 + -9 = 0
0 + 4x = 35 + -9
4x = 35 + -9

Combine like terms: 35 + -9 = 26
4x = 26

Divide each side by '4'.
x = 6.5

Simplifying
x = 6.5

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