3x-4=9x-7x

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


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

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

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

Solving
-4 + 3x = 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
-4 + 3x + -2x = 2x + -2x

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

Combine like terms: 2x + -2x = 0
-4 + 1x = 0

Add '4' to each side of the equation.
-4 + 4 + 1x = 0 + 4

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

Combine like terms: 0 + 4 = 4
1x = 4

Divide each side by '1'.
x = 4

Simplifying
x = 4

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