7TH GRADE MATH NEEDED ASAP!! margo can purchase tile at a store for $0.99 per tile and rent a tile saw for $12. At another store she can borrow the tile saw for free if she buys tiles there for $1.39 per tile. How many tiles must she buy for the cost to be the same at both stores?

OK

At the first shop: Cost =  

$

0.79

×

x

+

$

24

=

0.79

x

+

24

At the second shop: Cost =  

$

1.19

×

x

=

1.19

x

If the cost is the same:

1.19

x

=

0.79

x

+

24

←

solve for x

1.19

x

−

0.79

x

=

24

0.4

x

=

24

x

=

24

0.4

x

=

60

tiles

Step-by-step explanation:

If she buys less than 60 tiles, then the second shop is cheaper.

If she buys more than 60 tiles, then the first shop is cheaper

step-by-step explanation:

a rhombus is a parallelogram enjoying his symmetry.