3+x=20

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Solution for 3+x=20 equation:


3+x=20

We simplify the equation to the form, which is simple to understand 
3+x=20

We move all terms containing x to the left and all other terms to the right. 
+1x=+20-3

We simplify left and right side of the equation. 
+1x=+17

We divide both sides of the equation by 1 to get x. 
x=17

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