A jar contains only pennies, nickels, dimes, and quarters. There are 11 pennies, 23 dimes, and 14 quarters. The rest of the coins are nickels. There are 72 coins in all. How many of the coins are not nickels? If n represents the number of nickels in the jar, what equation could you use to find n?

48 are not n and n=24

Step-by-step explanation:

add all the coins together, then subtract the sum from 72, you get 24 so n=24 and not n=48

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.