Systems of Equations Flashcards
6 cards from real Algebra Test practice questions. Tap to flip, then mark Knew It or Still Learning โ missed cards come back until you master them.
Read the first 6 Systems of Equations flashcards as text
Solve: x + y = 10 and x - y = 4
Answer: x = 7, y = 3
Adding the equations gives 2x = 14, so x = 7; substituting gives y = 3.
When a system of two linear equations has no solution, geometrically the lines are:
Answer: Parallel
No solution means the lines are parallel and never intersect.
Solve by substitution: y = 2x and x + y = 9
Answer: x = 3, y = 6
Substitute y = 2x: x + 2x = 9, so x = 3 and y = 6.
A consistent dependent system has:
Answer: Infinitely many solutions
A consistent dependent system represents the same line, giving infinitely many solutions.
Solve: 2x + 3y = 12 and x = 3
Answer: y = 2
Substitute x = 3: 6 + 3y = 12, so 3y = 6 and y = 2.
Which method eliminates a variable by adding or subtracting equations?
Answer: Elimination
The elimination method adds or subtracts equations to cancel one variable.