Combining Multiple Equations

Systems involve solving for values that satisfy more than one equation at the same time.

Types

• Systems of Equations: Two or more equations, solved together
• Inequalities: Using \( <, >, \leq, \geq \) instead of \( = \)

Solving Systems

• Substitution: Replace one variable with an equivalent expression
• Elimination: Add/subtract equations to eliminate a variable

Graphing

• The solution is where the equations' graphs intersect

Real-World Scenarios

Systems help with comparing phone plans, budgeting, or scheduling.

ACT Advice

Check if you can add or subtract equations to make solving easier.