12:7=9:x12/x = 9/712 7 = 9 x84 = 9xx = 84/9x = 9.33
6.5:5.2=x:86.5/5.2 = x/81.25 = x/8x = 1.25 * 8x = 10
4.5:3.6=x:44.5/3.6 = x/41.25 = x/4x = 1.25 * 4x = 5
96:2.5=19.2:x96/2.5 = 19.2/x38.4 = 19.2/xx = 19.2/38.4x = 0.5
12:7=9:x
12/x = 9/7
12 7 = 9 x
84 = 9x
x = 84/9
x = 9.33
6.5:5.2=x:8
6.5/5.2 = x/8
1.25 = x/8
x = 1.25 * 8
x = 10
4.5:3.6=x:4
4.5/3.6 = x/4
1.25 = x/4
x = 1.25 * 4
x = 5
96:2.5=19.2:x
96/2.5 = 19.2/x
38.4 = 19.2/x
x = 19.2/38.4
x = 0.5