Simultaneous Linear Equations
Maths: Edexcel IGCSE Higher, topic 2.3.2
Simultaneous Equations
Solve the simultaneous equations equations -x + 3y = 6 and 3x - 3 = 2y:
Label equations
Rearrange to get x and y's on one side
Multiply to get same x term
Add or subtract to eliminate x
Simplify
Simplify
Find solution for y
Sub solution for y back into equation 2
- We could also sub the solution into equation 1 and we would get the same answer.
Simplify to find x
Find the solution for x
Sub solutions back into equation 1 as a check
