Question

A pencil at a stationery store costs $1, and a pen costs $1.50. Shawn spent $12 at the store. He bought a total of 9 items. Which system of equations can be used to find the number of pencils (x) and pens (y) he bought?

Answer 1

9x=£9. 9y=13.50. It has to be an even number of y or you will get a decimal and 12 is not a decimal. 7x+2y=£10 5x+4y=£11. 3x+6y=£12 The answer is three pencils and 6 pens.

Answer 2

x= 3 pencils 3+6=9 items
y= 6 pens
So, Shawn bought 3 pencils and 6 pens. 1 pen equals 1.50 and a pencil only costs a dollar and he spent 12 dollars so now if he bought 6 pens and 3 pencils that would equal 12.