#### Chapter 4 System of Linear Equations

Section 4.2 LS in two Variables

# 4.2.4 Exercises

##### Exercise 4.2.14
Solve the following systems of linear equations using the substitution method:
1. $3x+y=4$ and $-x+2y=1$,
2. $-x+4y=5$ and $2x-8y=-10$.

##### Exercise 4.2.15
Solve the following systems of linear equations using the addition method:
1. $2x+4y=1$ and $x+2y=3$,
2. $-7x+11y=40$ and $2x+5y=13$.

##### Exercise 4.2.16
Solve the following system of linear equations graphically: $2x=2$ and $x+3y=4$.