I am thinking of a number. I multiplied by 3, subtracted by 8, doubled the result, and added 14. Then i added on 50% of what I had and subtracted 11. Then i divided by 5. After all that, I was left with 8.
What number did i start with?
-6
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2$\begingroup$ You do know that this is a basic Algebra problem and not a riddle, right? $\endgroup$ – You Apr 9 '16 at 19:01
3
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You started with 6. 8*5=40, 40+11=51, 2/3*51=34, 34-14=20, 20/2=10, 10+8=18, 18/3=6.
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$\begingroup$ i did not understand why you did 2/3*51 , i did not know how to get the original number based on the current number and a percent care to explain? $\endgroup$ – MrNeedsaHand Apr 9 '16 at 18:52
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$\begingroup$ Because you took a number x and multiplied it by 1.5 to get 51, that means that 1/3 of 51 would be 1/2 of x, so 2/3 of 51 would be x, which was 34. $\endgroup$ – Benana2222 Apr 9 '16 at 19:01
