3/4 divided by 1/5 = 3 3/4
Hope that helps :)
X = 3
and
formula -
(y-y1)/(x-x1) = (y2-y1)/(x2-x1)
(x1,y1) = (4,1)
(x2,y2) =( 5,3)
(y-1)/(x-4) = (3-1)/(5-4)
y-1/x-4 = 2/1
y-1 = 2x - 8
y = 2x - 7
the solution will be x= 3 and y = -1
check attached file it has the answers
3x =-18
X= -12
4r^2=4 if r=1
2s^3=250 if s=5