a corner store sells two kinds of bakes goods;cakes and pies. a cake cost $5 and a pie costs $7. in one day, the store sold 15 baked goods for a total cost of $91. how many cakes did they sell?..PLEASE HELP

Question

hba · Answer

use the equations:

let x=cake
     y=pie

 x+y=15
 5x+7y=91

anonymous · Answer

ok but how would i get the answer

hba · Answer

We have linear equation in two variables.

Use either Substitution or Elimination.

anonymous · Answer

I DONT KNOW HOW THOUGH BUT I KNOW THE ANSWER IS EITHER.. 4 8 OR 5

anonymous · Answer

is the answer 7?

hba · Answer

We can use Elimination.

Multiply Eq(1) by 7 and subtract Both equations.

The value of x is your answer :)