Mathematics for IGCSE & O level - Equations (Section 6 - No. 4)
When solving simultaneous equations, what strategies can you use to manipulate the equations? (Select all that apply)
Multiply an equation by a constant
Divide an equation by a constant
Add the equations together
Subtract the equations
คำอธิบาย
These are all valid algebraic manipulations to eliminate variables or simplify the equations.