Name ________________________________________
Algebra - Pd ____
Date _____________
Systems of Equations Review
Solve the following using substitution:
1) x + 3y = 4
2x - y = 1
2) 2x - y = -1
y=x-1
3) y = 3x + 5
12x - 7y = 1
Solve the following using elimination:
4) 13x - 3y = 78
4x + 6y = -66
5) -7y + 3x = 42
5y + 2x = 57
6) -8x + 5y = 97
10x = -7y + 51
Solve the following using either method:
7) 2x = y + 9
6x + 3y = 15
8) 4x - 6y = 15
6x - 4y = 10
9) y = 3x + 4
8x - 9y = -139
10) 45 is what percent of 720?
11) 165 is 35% of what number?
x  4 5x  4
2 x  8 3x  9


12)
13)
3
18
4
3
14) Jill had $300 in the bank. She then deposited $15. This represents what percent of her
original amount
15) In a school 60 students are in the band. This represents 12% of the students body. How
many students are not in the band?
16) In a class of 560 students 85% of the students watched the Superbowl. How many students
did not watch the game?
14) An angle whose measure is 120° is divided into three parts that are in a ratio of 2:3:7. Find
the number of degrees in each angle.
15) Of the 126 students in the 8th grade, the ratio of boys to girls is 4:5. How many girls are in
the 8th grade?
16) Two numbers have the ratio 7:5. Their difference is 12, find the two numbers.