Finally, you divide each side by 5 to isolate the x so you get x=2/5.
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Now that you hopefully understand the concept let's do your problem.
So we are going to multiply 0.381 by .05 AND -2x.
You get: .01905-.762x=x
So now we solve for x (isolate it).
Add .762x to each side so you get..
.01905=1.762x
Now divide each side by 1.762 and you get:
.0108=x
However, if you round this you would get .011
Hope this helps! :)