6 is final 'answer'
you divided 4, so you must multiply 4 now
6 x 4 = 24
you subtracted 6, so you must add 6
24 + 6 = 30
you multiplied 3, so you must divide 3 now
30/3 = 10
you added 2, so you must subtract 2
10 - 2 = 8
8 is your starting number
work backwards
hope this helps
