3x+4-x=7x+9

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Solution for 3x+4-x=7x+9 equation:


Simplifying
3x + 4 + -1x = 7x + 9

Reorder the terms:
4 + 3x + -1x = 7x + 9

Combine like terms: 3x + -1x = 2x
4 + 2x = 7x + 9

Reorder the terms:
4 + 2x = 9 + 7x

Solving
4 + 2x = 9 + 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.
4 + 2x + -7x = 9 + 7x + -7x

Combine like terms: 2x + -7x = -5x
4 + -5x = 9 + 7x + -7x

Combine like terms: 7x + -7x = 0
4 + -5x = 9 + 0
4 + -5x = 9

Add '-4' to each side of the equation.
4 + -4 + -5x = 9 + -4

Combine like terms: 4 + -4 = 0
0 + -5x = 9 + -4
-5x = 9 + -4

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

Divide each side by '-5'.
x = -1

Simplifying
x = -1

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