The number is 12.
12 ÷ 2 = 6
6 - 4 = 2
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Pick any number. Multiply by 6. Add 13. Subtract 7. Divide 3. Divide 2. Then subtract by the original number you chose. Your result will always be 1. Tell a friend to mentaly multiply their age by 2. Tell them to add 14 then divide 2. Ask your friend what number they currently have. Now, you mentally subtract 7 from the number they tell you, then you'll know your friend's age.
7
it means multiply the the number in the ones place by two and use that number to subtract
34?
Let X = the number X + 2 = 3X+6 subtract x from both sides 2 = 2X +6 2X + 6 = 2 subtract 6 from both sides 2X = -4 divide by 2 X = -2 = the number