Mick picked a numer,doubled it,added 8 and divided by 4 and got 12 what number did he start out with?
2007-01-29 07:21:15 · 17 answers · asked by Anonymous in Education & Reference ➔ Homework Help
The answer is 20. Work backwards.
He ended with 12 by dividing by 4, so multiply by 4 to get 48. Then he added 8, so lets subtract 8 to get 40. This is double his original number, so the original number must be 20.
2007-01-29 07:24:36 · answer #1 · answered by theeconomicsguy 5 · 0⤊ 0⤋
20
2007-01-29 07:24:54 · answer #2 · answered by eb 1 · 0⤊ 0⤋
20
2007-01-29 07:24:39 · answer #3 · answered by daanzig 4 · 0⤊ 0⤋
20
2007-01-29 07:24:25 · answer #4 · answered by Anonymous · 0⤊ 0⤋
20
2007-01-29 07:23:45 · answer #5 · answered by The Evil One 1 · 0⤊ 0⤋
12 times 4 is 48 minus 8 is 40 40 divided by 2 is 20 so the number was 20..
20 doubled is 40 then add 8 is 48 and divided by 4 is 12.
just so u kno im only 8 the thing is to work backwards.. thanks that was kind of fun doing that.
2007-01-29 07:26:33 · answer #6 · answered by kitten baby 2 · 1⤊ 0⤋
(x*2+8)/4=12 => x*2+8=12*4[48]=> x*2=48-8[40]=> x=40/2=20...so Mike picked 20
2007-01-29 07:27:44 · answer #7 · answered by Tudor 1 · 0⤊ 0⤋
20 (20*2= 40, 40+8 = 48, 48/4 =12)
2007-01-29 07:24:42 · answer #8 · answered by kewltazdude 3 · 0⤊ 0⤋
reverse the process.
12 x 4 = 48
48 - 8 = 40
40 divided by 2 = 20
He started with 20
2007-01-29 07:24:49 · answer #9 · answered by Anonymous · 0⤊ 0⤋
Just work it backwards....
12 X 4 = x
x - 8 = y
y / 2 = the number that Mick picked...
2007-01-29 07:24:37 · answer #10 · answered by Nasubi 7 · 0⤊ 0⤋