j) x = 22/5 • 2/11 => x=4/5
k) 5x = 1/4 • 25/8 ; 5x = 25/32 => x=25/32 : 5 => x=25/32 • 1/5 => x=5/32
l) 5x/6 = 1/4 • 3/2 ; 5x/6 = 3/8 => 40x=18 |:2 => 20x=9 => x=9/20
m) x = 11/15 : 22/5 => x=11/15 • 5/22 => x=1/6
n) x = 11/4 : 33/8 => x=11/4 • 8/33 => x=2/3
o) 2x = 21/4 : 49/8 => 2x = 21/4 • 8/49 => 2x = 42/49 => 2x = 6/7 => x = 6/7 : 2 => x = 6/7 • 1/2 => x=3/7
