1) x : 4 = 5/7

x = 5/7 * 4

x = 20/7 = 2(6/7)

2) x : 3(3/4) = 2(2/3)

x = 2(2/3) * 3(3/4)

x = 8/3 * 5/14 = 120/12 = 10

3) 3(1/2) : x = 5/6

x = 3(1/2) : 5/6

x = 7/2 * 6/5 = 42/10 = 21/5 = 4(1/5)

4) 3/8 : x = 1(1/3)

x = 3/8 : 1(1/3)

x = 3/8 : 4/3 = 3/8 * 3/4 = 9/32

5) x + 3 = 4(1/2)

x = 4(1/2) - 3 = 1(1/2)

6) x - 6 = 3(3/4)

x = 3(3/4) + 6 = 9(3/4)

7) 8(3/4) - x = 3(1/4)

x = 8(3/4) - 3(1/4) = 5(3/4)