2x + 7
Well, buttercup, if you want to solve this little brain teaser, you just set up an equation like this: 2x - 7 = 15. Then you solve for x by adding 7 to both sides, giving you 2x = 22. Finally, you divide by 2, and voila, the number you're looking for is 11. Easy peasy lemon squeezy!
n+7/6
The smallest number into which both 7 and 15 can be divided evenly is 105.
If you want "the number" write 5 + 2X = 7 2X = 2 X = 1. So "five more than twice of one is 7.
Let the number be x Twice a number means 2x 7 less than twice a number means 2x-7
2*(7 + 15) = 2*22 = 44
2x + 7
?=2n+7
If you mean... -7+x*2=23 then x = 15. Done without the aid of a calculator ! The value of 'x' (the unknown number) MUST equal 30, because 30-7=23 - SO, half the unknown number must be 15!
2(x +7) = -1 2x + 14 = - 1 2x = -15 x = -7.5
2k - 7
Well, buttercup, if you want to solve this little brain teaser, you just set up an equation like this: 2x - 7 = 15. Then you solve for x by adding 7 to both sides, giving you 2x = 22. Finally, you divide by 2, and voila, the number you're looking for is 11. Easy peasy lemon squeezy!
The fraction 7/15 (represented in decimal form by 0.4666...) increased by 59 of itself is equal to the number 28. You can solve this by adding 1 to 59 (60) and then divide 28 by 60.
Then the number is 3
n+7/6
Atom number 7 is Nitrogen, 157N , isotope 15 with mass number 15 The answer is N(15) isotope