Question

o figure out a special number, Tammi’s mother was supposed to double her age and then add 4. Instead, Tammi’s mother added 4 to her age and then doubled that number. Tammi’s mother thought the special number was 80. What was the special number supposed to be?

Answer 1

40

her age was 36 she added 4nwhich made 40 then doubles makesn80

Answer 2

9514 1404 393

Answer:

76

Explanation:

For age 'a', the special number was supposed to be ...

2a +4

Tammi's mother actually calculated it as ...

2(a +4) = 2a +8

a value that is (2a+8) -(2a+4) = 4 more than it was supposed to be.

The special number was supposed to be 80 -4 = 76.