3(s-5)/4 -3 = 4s- (s-3)/2
pls answer fast

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /