Pick a number. Multiply by 2. Subtract 8. Divide by 2. Add 4. What is the result? Use algebra to show why the tricks work.

Question

MsPi_3.14159265 · Answer

Try first with a number... say 7 first multiply by 2, that is 7x2=14 subtract 8, that is 14-8=6 divide by 2, that is 6/2= 3 add 4, that is 3 + 4 = 7 So what happened to your original number??

Bosnian · Answer

x = your number ( x * 2 - 8 ) / 2 + 4 = x * 2 / 2 - 8 / 2 + 4 = x - 4 + 4 = x

Cheyenne · Answer

(7×2)-8÷2+4=7

Anonymous · Answer

Not my Question lol