Solve the following simultaneous equation for x and y: 2x + 5y = 8, 4x + y = 7
Equation A: 2x + 5y = 8
Equation B: 4x + y = 7
2A: 4x + 10y = 16
2A - B: 9y = 9, Therefore y = 1
Sub y back into equation A to find x: 2x + 5 = 8, 2x = 3, x = 1.5
Related Maths GCSE answers
All answers ▸The equation of the line L1 is y=3x–2. The equation of the line L2 is 3y–9x+5=0. Show that these two lines are parallel.
