Mary ordered lunch for herself and several co-workers on monday and tuesday. on
monday, she paid $7 for 5 sandwiches and 4'sodas. on tuesday, 'she paid $6 for 4 of
each. find the price of a sandwich and the price of a soda.

the sandwiches are 1 dollar and soda for 50 cents

Step-by-step explanation:

Thus, the price of each sandwich is $1 and each soda $0.50.

Step-by-step explanation:

Let:

x: price of sandwiches

y: price of sodas

Now, write the equations for the amount that Mary paid on Monday and Tuesday for sandwiches & sodas:

Monday:

Tuesday:

When adding Tuesday equation from Monday equation, we found that x = 1. This value can be substituted into one of the equations. By substituting into Monday equation:

Now, let's solve the equation with one variable:

= 2 " alt="\frac{4x}{4} = \frac{2}{4}" /> = 2 " />

Thus, the price of each sandwich is $1 and each soda $0.50.