30-x=399

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Solution for 30-x=399 equation:


30-x=399

We simplify the equation to the form, which is simple to understand 
30-x=399

We move all terms containing x to the left and all other terms to the right. 
-1x=+399-30

We simplify left and right side of the equation. 
-1x=+369

We divide both sides of the equation by -1 to get x. 
x=-369

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