Year 10 maths · B.3 · Systems of Equations
Solve systems by elimination
Add the equations so one letter disappears.
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Solve the system: 4x + y = −12 and −x − y = 0
Answer: x: -4; y: 4
Solve the system: −x − y = 3 and 3x + y = −1
Answer: x: 1; y: -4
Solve the system: −5x + y = −18 and 2x − y = 9
Answer: x: 3; y: -3
Tip: Add the equations so one letter disappears.
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