Answer:
£ 0.45
Explanation:
Let x be the cost of an orange, and y be the cost of a cauliflower then...
2x+y=2
4x+y=2.90
We can solve this system using elimination. In this case, we can eliminate y by subtracting the two equations:
-2x=-0.90
Divide both sides by -2
x=0.45
One orange is £ 0.45