30-4x=42

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Solution for 30-4x=42 equation:


30-4x=42

We simplify the equation to the form, which is simple to understand 
30-4x=42

We move all terms containing x to the left and all other terms to the right. 
-4x=+42-30

We simplify left and right side of the equation. 
-4x=+12

We divide both sides of the equation by -4 to get x. 
x=-3

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