I'm having problems solving linear equations with fractions

So first multiply the denominator by it self on both sides so say you have 2/3x=8 you would multiply it by 3 so then you have 2x=24 because the denominator cancels it’s self out and on the other side you multiply it by the denominator so 3•8=24. Once you have that you want to separate 2 from x so you would divide 2 on both sides making it x=12

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You need to include the original coordinates of the triangle to answer this. and how much does it translate (move left right up down)