Algebra
Systems of Equations
A system of equations is a set of equations with multiple variables that are solved together.
Key Formulas
Substitution
Solve for one variable and substitute.
Elimination
Eliminate a variable by combining equations.
Key Concepts
Substitution methodElimination methodGraphical solutionConsistent/inconsistent systems
Worked Examples
1
Solution:
Calculators for this topic
Work through your own numbers with step-by-step solutions.
Related Formulas & Theorems
Ready to practice?
Test your understanding with generated practice problems and instant feedback.
Start PracticingRelated Topics
Linear Equations
A linear equation is an equation of the first degree — the highest power of the variable is 1. It graphs as a straight line.
Quadratic Equations
A quadratic equation has the form ax² + bx + c = 0. It can have two, one, or zero real solutions.
Polynomials
A polynomial is an expression of multiple terms with variables raised to non-negative integer powers.
Functions
A function is a relation that assigns each input exactly one output. Functions are central to all of mathematics.