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DATE
NAME
8-4
Student Edition
Pages 475–481
Practice
Elimination Using Multiplication
Use elimination to solve each system of equations.
1. 2x 1 5y 5 3
2x 1 3y 5 27
2. 2x 1 y 5 3
24x 2 4y 5 28
3. 5x 2 2y 5 210
3x 1 6y 5 66
4. 7x 1 4y 5 24
5x 1 8y 5 28
5. 4x 2 2y 5 214
3x 2 y 5 28
6. 5x 1 3y 5 210
3x 1 5y 5 26
7. 2x 1 y 5 0
5x 1 3y 5 2
8. 9x 2 6y 5 212
x 1 2y 5 0
9. 0.5x 1 0.5y 5 22
x 2 0.25y 5 6
Use a system of equations and elimination to solve each
problem.
10. The sum of the digits of a two-digit
number is 11. If 45 is added to the
number, the result is the number
with the digits reversed. Find the
number.
© Glencoe/McGraw-Hill
11. Suppose you invested $10,000, part
at 6% annual interest and the rest at
9% annual interest. If you received
$684 in interest after one year, how
much did you invest at each rate?
59
Algebra 1
DATE
NAME
8-4
Student Edition
Pages 475–481
Practice
Elimination Using Multiplication
Use elimination to solve each system of equations.
1. 2x 1 5y 5 3
2x 1 3y 5 27
2. 2x 1 y 5 3
24x 2 4y 5 28
3. 5x 2 2y 5 210
3x 1 6y 5 66
4. 7x 1 4y 5 24
5x 1 8y 5 28
5. 4x 2 2y 5 214
3x 2 y 5 28
6. 5x 1 3y 5 210
3x 1 5y 5 26
7. 2x 1 y 5 0
5x 1 3y 5 2
8. 9x 2 6y 5 212
x 1 2y 5 0
9. 0.5x 1 0.5y 5 22
x 2 0.25y 5 6
(4, 21)
(24, 6)
(22, 4)
(1, 1)
(21, 5)
(
21,
1
2
(2, 10)
(22, 0)
(4, 28)
)
Use a system of equations and elimination to solve each
problem.
11. Suppose you invested $10,000, part
at 6% annual interest and the rest at
9% annual interest. If you received
$684 in interest after one year, how
much did you invest at each rate?
10. The sum of the digits of a two-digit
number is 11. If 45 is added to the
number, the result is the number
with the digits reversed. Find the
number.
38
© Glencoe/McGraw-Hill
$7200 at 6%, $2800 at 9%
T59
Algebra 1