Mathematics for IGCSE & O level - Equations (Section 8 - No. 16)
If you're solving the system of equations: y = 3x - 2 and 2x + y = 8, which method would be most suitable?
Graphing
Elimination
Substitution
Cross-multiplication
คำอธิบาย
Substitution is convenient when one equation is already solved for a variable.