Iron collecting

Class 7 A collected 3.2 tonnes more iron than class 7B. Together they collected 6.4 tonnes of iron for the scrap metal drive. How much did each class collect?

Final Answer:

a =  4.8 t
b =  1.6 t

Step-by-step explanation:


a=3.2 + b
a+b = 6.4

a-b = 3.2
a+b = 6.4

Row 2 - Row 1 → Row 2
a-b = 3.2
2b = 3.2


b = 3.2/2 = 1.6
a = 3.2+b = 3.2+1.6 = 4.8

a = 24/5 = 4.8
b = 8/5 = 1.6

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