f) 2x = 3,9 => x = 39/10 × 1/2 = 39/20
g) x/9 = 3 + 21/4 ; 4x = 108 + 189 ; 4x = 297 => x = 297/4
h) 2x/3 = 1 + 4/3 ; 2x = 7 => x = 7/2
i) 5x/6 = 3/2 + 1/4 ; 10x = 21 => x = 21/10
j) 11x/2 = 22/5 ; 55x = 44 => x = 44/55 = 4/5
k) 5x × 8/25 = 1/4 ; 8x/5 = 1/4 => x = 1/4 × 5/8 = 5/32
l) 5x/6 × 2/3 = 1/4 ; 5x/9 = 1/4 => x = 1/4 × 9/5 = 9/20
m) x = 11/15 × 5/22 = 1/6
n) x = 11/4 × 8/33 = 2/3
o) 2x = 21/4 × 8/49 = 6/7
