=7x-2x+4x

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Solution for =7x-2x+4x equation: 


Simplifying
0 = 7x + -2x + 4x

Combine like terms: 7x + -2x = 5x
0 = 5x + 4x

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

Solving
0 = 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
0 + -9x = 9x + -9x
Remove the zero:
-9x = 9x + -9x

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

Divide each side by '-9'.
x = 0

Simplifying
x = 0

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