20=18-x/2

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Solution for 20=18-x/2 equation: 



20=18-x/2

We move all terms to the left:

20-(18-x/2)=0

We add all the numbers together, and all the variables

-(-x/2+18)+20=0

We get rid of parentheses

x/2-18+20=0

We multiply all the terms by the denominator


x-18*2+20*2=0

We add all the numbers together, and all the variables

x+4=0

We move all terms containing x to the left, all other terms to the right

x=-4

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