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## Homework Statement

Tea served in a canteen is made from a mixture of two different types of tea, type A and type B. Type A costs €12.15 per kg. Type B costs €12.90 per kg. The mixture costs €12.65 per kg.

If the mixture contains 7kg of type A, how many kilograms of type B does it contain?

## Homework Equations

## The Attempt at a Solution

all i've written so far is: 12.15 x 7 = €85.05

and i dont even know where im going with that