Question

Black pencils cost N75 each and colored pencils cost N105 each. If 24 mixed pencils cost N2010, how many were black?

Answer 1

Answer:

let black pencil be x

So colored pencils be(24-x)

A.T.Q.

75(x)+105(24-x)=2010

75x+2520-105x=2010

-30x=2010-2520

-30x=-510

x=17

No. of black pencils were 17