3x=200-4x

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Solution for 3x=200-4x equation: 


Simplifying
3x = 200 + -4x

Solving
3x = 200 + -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.
3x + 4x = 200 + -4x + 4x

Combine like terms: 3x + 4x = 7x
7x = 200 + -4x + 4x

Combine like terms: -4x + 4x = 0
7x = 200 + 0
7x = 200

Divide each side by '7'.
x = 28.57142857

Simplifying
x = 28.57142857

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