Answered

A box of chalk and 2 dusters cost $10.
3 boxes of chalk and 2 dusters cost $18.
Find the total cost of 1 box of chalk and 1 duster.

Sagot :

3BC + 2D = $18

1BC + 2D = $10

_____________

2BC = $8

BC = $4 ( cost Box of chalk )

1BC + 2D = $10

$4 + 2D = $10

D=$3( cost of duster )

Total cost is $7