SAT PRACTICE QUESTION:

The sum of three numbers is 6. Each number is increased by 20 and the new numbers are multiplied by 10. What is the sum of the resulting numbers?

Could you help me set up an equation?

Question

SAT PRACTICE QUESTION:

The sum of three numbers is 6. Each number is increased by 20 and the new numbers are multiplied by 10. What is the sum of the resulting numbers?

Could you help me set up an equation?

kainui · Answer

You have 3 numbers, let's call them a, b, and c. What do we know? a+b+c=6. Can you try making more equations like this based off the information given? Take your best guess we'll help you out.

anonymous · Answer

$a+b+c=6$
$$10(a+20+b+20+c+20)=?$$

anonymous · Answer

10a + 200 + 10b + 200 + 10 c + 200 = 

10a + 10b + 10c + 600

anonymous · Answer

you got it?

anonymous · Answer

It says the answer is 660. Why is that?

anonymous · Answer

make 10a+10b+10c=x-600
solve for a+b+c

anonymous · Answer

10a + 10b + 10c = x - 600

a + b + c = x/10 - 6

anonymous · Answer

Ok yes, I got it:

10(a + 20) + 10(b + 20) + 10(c + 20) = required sum
10a + 200 + 10b + 200 + 10c + 200 = 600 + 10(a + b + c)
Since a + b + c = 6; the sum = 600 + 60 = 660