(a)   x6=60

(a)   x3=9

4x (a)   =36

5x (a)   =20

2x (a)   =18

5x (a)   =45

(a)   x2=12

(a)   x6=48

(a)   x7=42

7x (a)   =35

10x (a)   =70

(a)   x3=6

(a)   x4=36

7x (a)   =42

6x (a)   =24

8x (a)   =32

(a)   x1=4

(a)   x8=72

(a)   x3=21