# Math

posted by .

Mrs. Chans math class contributed 2 dollars and \$1 coins to an earthquake relief fund. the number of \$1 coins contributed was 8 less than 5 times the number of \$2 coins contributed. if class raised total of 160 bucks, how many coins of each type was collected?

it says i have to solve this by the elimination method, and i cant seem to figure out.

• Math -

Let x = number of \$1 coins and y = number of \$2 coins.

x = 5y - 8
x - 5y = -8

x + 2y = 160

Multiply first equation by 2 and second by 5.

2x - 10y = -16
5x + 10y = 800

7x = 784
x = ?

Put value of x in first equation to find y. To check, put both values into the second equation.

## Similar Questions

1. ### To Helper

I had a problem to solve, and I don't get how to make equations from this problem. Mrs. Chans math class contributed 2 dollars and \$1 coins to an earthquake relief fund. the number of \$1 coins contributed was 8 less than 5 times the …
2. ### Math

Susan has some \$2-coins and \$5-coins. If there are 18 coins and the total amount of these coins is not less than \$75, find the minimum number of \$5-coins.
3. ### maths

A bag contained a number of 20cents, 50cents and \$1 coins. 1/3 of the 20cents coins is equal to 2/3 of the 50cents coins. There are 3/5 as many 50cents coins as \$1 coins. If the total value of these coins is \$23.10, how many coins …

I need to use quarters, dimes, nickles and pennies to make the following: \$1.53 in 12 coins \$2.53 in 20 \$2.32 in 15 coins \$2.00 in 22 \$1.45 in 10 coins \$1.76 in 16 coins \$0.85 in 11 coins \$1.01 in 12 coins \$1.29 in 15 coins
5. ### maths

mohan changed 2 in to 5 p 20 p and 50 p coins. if the number of 5 p coins was double the number of 20 p coins and the 50 p coins were one fifth the 20 p coins . how many coins of each denomination did he get?
6. ### linear equations in one variable

I have a total of ₹300 in coins of denomination ₹1,₹2 and ₹5.The number of ₹2 coins is 3 times the number of ₹5 coins.The total number of coins is 160.How many coins of each denominations are with …
7. ### Math

Jun Wei has 12 more 10 cent coins than 20 cent coins. The total value of all his coins is \$5.40. Find the total number of coins he has.
8. ### Math

Jun Wei has 12 more 10 cent coins than 20 cent coins. The total value of all his coins is \$5.40. Find the total number of coins he has.
9. ### Maths

There are x no of 5 rupee coins and the no. of 2 rupee coins is 3 times more than the no of 5 rupee coins. Their total sum=₹77. Find the number of ₹2 coins and ₹5 coins.
10. ### math

Each student in a class contributed as many paise as number of student in the class.teacher contributed rs 13 to make total collection of rs 49.how many students were in the class?

More Similar Questions