Posted by **Isis** on Monday, March 25, 2013 at 6:01pm.

Wesley and Delia are playing a math game. Wesley gives Delia these step to follow.

Step 1: Multiply a number by 6 and then subtract by 4.

Step 2: Divide the result by 2

Step 3: Add 3 to the result from the second step.

If Delia's final answer is 19, What was the original number?

PLEASE HELP ME!!!

- Pre-calculus. -
**Reiny**, Monday, March 25, 2013 at 6:28pm
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

38+4 =42

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 ???

- Pre-calculus. -
**Isis**, Monday, March 25, 2013 at 7:47pm
i guess it will help.. thank you :)

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