How does this work “Think of a #. Add 7. Double the result. Subtract 8. Double the result. Add 12. Divide by 4. Subtract 6. Your answer will be the original number.

Question

How does this work “Think of a  #. Add 7. Double the result. Subtract 8. Double the result.  Add 12. Divide by 4. Subtract 6. Your answer will be the original number.

Reiny · Answer

Think of a #. ---- x Add 7 ---- x+7 Double the result ----- 2x+14 subract 8 ---- 2x+6 double the result ---- 4x+12 add 12 ------ 4x + 24 divide by 4 ---- x + 6 subtract 6 ---- x Mathemagics!