a cash register contains only five dollar and ten dollar bills. It contains twice as many five's and tens if the total amount of money is $680 how many tens are in the cash register?

There are 34 Tens and 68 Fives

Step-by-step explanation:

2X*5+X*10=680

Multiply 2X by 5 to get 10X.

10X+X*10=680

Multiply X by 10 to get 10X.

10X+10X=680

Since 10X and 10X are like terms, add 10X to 10X to get 20X.

20X=680

Divide each term in the equation by 20.

(20X) / (20) = (680) / (20)

Simplify the left-hand side of the equation by canceling the common factors.

X = (680) / (20)

Simplify the right-hand side of the equation by simplifying each term.

X=34 tens

68 fives

Prove:

34*10 = 340

68*5 = 340

340+340=680

There are 34 tens and 68 fives because 34*5 + 68*10 = 680.