## LLHZN 2 years ago Please help! Gerry is 4 years younger than Tom.If Tom is t years old, how old is Gerry? I know how to write the expression, but I don't know how to solve. Please help! Thanks!

1. Mashy

hmmm tom is t years old and gerry is 4 years YOUNGER!

2. LLHZN

yeah t-4.Ok now how you solve it?

3. Mashy

thats all.. thats the answer! :P

4. LLHZN

hm. okay i guess. How about this one: 150 people went to see "Ode to Algebra" performed in the school auditorium. If the number of children that attend the performance was, c, how many adults attend?

5. Mashy

you tell.. 150 people went to see it children were C.. so how many left?

6. LLHZN

i don't know, thats why I'm asking I'm a bit confused. Can you please explain?

7. Mashy

total people 150.. out of them 'c' number of them were kids.. so how many left??

8. LLHZN

I'm sorry I'm lost. Its confusing me, wouldn't it be 150=a+c ?? I'm sorry I don't really understand.

9. Mashy

lets start simple if i said.. out of 10 people 4 were children.. how many are adults?

10. LLHZN

6

11. Mashy

so that was 10 - 4 similarly out of 150.. c number of them are children.. hence the answer would be???

12. LLHZN

OH. 150?

13. Mashy

:O c is a variable.. c could be 1 or 2 or 150... so the answer is 150 - c

14. LLHZN

I feel stupid. But WHY would it be 1 , 2 , or 150?

15. Mashy

thats algebra.. its a variable.. a variable could be any number!!! so in general.. it would be 150 - c

16. LLHZN

Oh. okay. But since its saying to find the amt of adults, then wouldn't it be 150-c=a ?

17. Mashy

ok ok. yes.. 'a' is a variable that you are assigning to adults :)..

18. LLHZN

Ohh ok! Thank you so much!

19. Mashy

no probs ;-)

20. LLHZN

hey can you help me again??