Algebra Essentials: Mastering Key Concepts

Solve the 2-step equation: 3x + 4 = 19.

• x = 3
• x = 10
• x = 5
• x = 7

Using substitution, solve the system of equations: y = 2x + 3 and 4x - y = 9.

• The solution is x = 2 and y = 5.
• The solution is x = 5 and y = 12.
• The solution is x = 7 and y = 15.
• The solution is x = 3 and y = 9.

Using elimination, solve the system of equations: 2x + 3y = 7 and 4x - y = 11.

Determine if the following set of ordered pairs represents a function: {(2, 3), (4, 5), (2, 6), (7, 8)}.

Solve the 2-step equation: 5 - 2y = 11.

Using substitution, solve the system of equations: x = y - 1 and 2x + 3y = 12.

Using elimination, solve the system of equations: x + y = 6 and x - y = 4.

Identify if the following relation is a function: {(1, 2), (2, 3), (3, 4), (1, 5)}.

Solve the 2-step equation: 4z - 7 = 9.

Using substitution, solve the system of equations: 3a = b + 5 and 2a + b = 20.