1. Use substitution to solve the system of equations. x = 26 – 4y x = 26 – 4y x = 26 – 4(4) x – 5y = -10 x = 26 – 16 26 – 4y – 5y = -10 x = 10 26 – 9y = -10 -26 -26 – 9y = -36 The solution is ( 10, 4) -9 -9 y = 4 Example 2-1a

2. Use substitution to solve the system of equations. 16y – y = 75 The solution is (20, 5) Example 2-1a

3. Use substitution to solve the system of equations. y = 2x y = 2(1) y = 2 3x + 4(2x) = 11 3x + 8x = 11 11x = 11 11 11 x = 1 Answer: (1, 2) Example 2-1b

4. Use substitution to solve the system of equations. The solution is(5, –8) Example 2-2a

5. Use substitution to solve the system of equations. x = 3y + 2 x = 3(1) + 2 x = 3 + 2 3y + 2 + 7y = 12 x = 5 10y + 2 = 12 -2 -2 10y = 10 10 10 y = 1 Solution: (5, 1) Example 2-1b