(18-x)=4.20

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Solution for (18-x)=4.20 equation: 



(18-x)=4.20

We move all terms to the left:

(18-x)-(4.20)=0

We add all the numbers together, and all the variables

(-1x+18)-(4.2)=0

We add all the numbers together, and all the variables

(-1x+18)-4.2=0

We get rid of parentheses

-1x+18-4.2=0

We add all the numbers together, and all the variables

-1x+13.8=0

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

-x=-13.8

x=-13.8/-1

x=13+0.8/1

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