Answer:
Apple = €0.20
Banana = €0.60
Explanation:
Let A represent the price of an apple and B represent the price of a banana:
4A + B = €1.40
7A + B = €2.00 multiply first equation by -1 and then find the sum of the two equations:
-1 x (4A + B) = 1.40
-4A - B = -1.40
7A + B - 4A - B = 2.00 - 1.40
3A = 0.60 divide both sides by 3
A = 0.20 now we can use this information to calculate the price of a banana
4*0.20 + B = 1.40
0.80 + B = 1.40 subtract 0.80 from both sides
B = 0.60