Question

Jack withdrew £400 pounds from the bank. The cashier handed jack both £20 and £10 notes. There were 23 notes in total. How many more £20 notes did jack get than £10 notes?

Answer 1

@camerondoherty @ParthKohli @Abhisar

Answer 2

you can put y is the number of 20 notes;
and xi the number of 10 notets

Answer 3

you have 2 equations with 2 paramteres

Answer 4

x+y = 23 // you have 23 notes;
20*y + 10*x = 400;
solve this equation and you will get the right answers