Question

X+3 upon 4 = 2x-3 upon 5

Answer 1

x + 3 = 2x - 3
------- --------
4 5
by cross multiplication,
5x + 15 = 8x - 12
-3x = -27
x = 9

Answer 2

((1)) 

1.95 or -39/20.

x+3/4=2*-3/5

x = -6/5 -3/4

x = (-24-15)/20

x = -39/20 or 1.95

((2))
27/20 or 1.35
x+3/4 = 2x-3/5
3/4+3/5 = 2x-x
(15+12)/20 = x
27/20 = x = 1.35