21-4x=13

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Solution for 21-4x=13 equation:


21-4x=13

We simplify the equation to the form, which is simple to understand 
21-4x=13

We move all terms containing x to the left and all other terms to the right. 
-4x=+13-21

We simplify left and right side of the equation. 
-4x=-8

We divide both sides of the equation by -4 to get x. 
x=2

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