Question 457491
Given:

y = a/(a-x)

where:
a=1/4
x= 3/16
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y= .25/(1/4-3/16)
convert 1/4 to 4/16 to get
y= .25/(4/16-4/16)
y= .25/(1/16
y= .25(16)
y= 4
The value of y is 4
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y = a/(a-x)

y(a-x) = a
ay-xy = a
xy = ay-a

Divide by y

x = a - a/y