Ten it each group.
That depends on the number of nickels, their dates, and their condition.
How about: 18-6 = 12 and 2*12 = 24
2x - 2 = x - 38Subtract x from each side:x - 2 = -38Add 2 to each side:x = -36
There are fifteen (15) nickels.
Assuming that the phrase "doubled by 2" is tautological, the expression for a number multiplied by 2 (or a number doubled) is 2n.
Let N be the number of nickels. The value of nickels is 0.05N and the value of dimes is 0.10(2N-12). We can form the equation 0.05N + 0.10(2N-12) = 2.55 and solve for N. After solving, we find that there are 9 nickels.
It depends on the number of nickels.
If the number is doubles its total is doubled since its total is itself!
one third of an unknown number doubled is...
dime = 0.10 nickle = 0.05 (1) 0.10d + 0.05n = 6.05 (2) 2x 0.10d + 0.05(n-10)=9.85 0.20d + 0.05n - 0.5 = 9.85 0.20d + 0.05n = 10.35 To make things easy, I'll multiply everything by 100 (1) 10d + 5n = 605 (2) 20d + 5n = 1035 (1) 5n = 605 - 10d n = 121 - 2d (2) 5n = 1035 - 20d n = 207 - 4d 121 - 2d = 207 - 4d 121 + 2d = 207 2d = 86 d = 43 43 Dimes
A number decreased by 4 is n-4
A natural number is doubled when added to its reciprocal. Find that number!