1) 6 : x = 36 : 36/x = 36/36/x = 6/x = 5
2) 12 : 7 = 3 : 12/7 = 3/12x = 2x = 21/1x = 7/4
3) 4.9 : 0.35 = x : 34.9/0.35 = x/314 = x/3x = 14 * 3x = 490
4) x/21 = 9/1x = 21 * (9/14x = 189/1x = 13.5
5) x/16 = 3/x = 16 * (3/8x = 6
6) 108/90 = 42/108/90 = 42/1.2 = 42/b = 42/1.b = 35
1) 6 : x = 36 : 3
6/x = 36/3
6/x = 6/
x = 5
2) 12 : 7 = 3 :
12/7 = 3/
12x = 2
x = 21/1
x = 7/4
3) 4.9 : 0.35 = x : 3
4.9/0.35 = x/3
14 = x/3
x = 14 * 3
x = 490
4) x/21 = 9/1
x = 21 * (9/14
x = 189/1
x = 13.5
5) x/16 = 3/
x = 16 * (3/8
x = 6
6) 108/90 = 42/
108/90 = 42/
1.2 = 42/
b = 42/1.
b = 35