suppose you pick x
1: 6x - 4
2: (6x-4)/2 = 3x-2
then 3x-2 = 19
3x = 21
x = 7
Delia picked 7
or you can just do everything with inverse operations on reverse order
last thing she did was divide by 2
so first thing we do is multiply by 2
19x2 = 38
the middle thing she did was subtract 4, so we will add 4
the first thing she did was to multiply be 6, so the last thing we will do is divide by 6
42÷6 = 7
How about that ???
i guess it will help.. thank you :)
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