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(a)  Evie is given a 22% pay rise. Her new salary is £21960. What was Evie’s salary before the pay rise?

(b)  An oil tank has sprung a leak and loses 77.5% of its contents. There is now 333 litres of oil in the oil tank. How much oil was in the oil tank before the leak?

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(a) Using the diagram on the right, find the length of DF.
(b) Using the diagram on the right, find the length of BC.

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(a) 6x + y = 18
4x + y = 14

(b) 4x + 2y = 10
x + 2y = 7

(c) 4x + 2y = 34
3x + y = 21

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