Algebra 1
7.2 Day 2 Homework
Name: ________________________________
Date: __________________ Period: ______
REVIEW: SOLVING SYSTEMS
1)If you are solving the linear system shown
using the substitution method, which variable
would you solve for in which equation? (Circle
the best variable to solve for)
2) Solve the following system of equations by
graphing
-5x + 3y = 3
4x + 3y = 30
5x + 7y = 3
6x - 3y = 24
Explain why you picked that variable:
SOLVING SYSTEMS USING SUBSTITUTION: (Hint – remember to clear out decimals!)
3) 2x = 12
4)
35x + y = 20
x – 5y = - 29
1.5x – 0.1 y = 18
5)
0.02x + .1y = - .18
5.5x + 1.8y = 27.6
6)
x+y=0
x – 2y = 6
List the Solution to the following systems of equations by looking at the graph:
7)
8)
9)
Solution: ________________________
Solution: ________________________
Solution: ________________________
10) Solve the following by setting up a system of equations and then using Substitution:
Laura has a total of 27 coins consisting of quarters (x) and dimes (y). Altogether they add to $4.50. How
many of each type of coin does she have?