Question 998619

One grocery store charges $10.00 for 8 cans of soup. A second store charges $6.00 for 5 cans of soup, but you need to join a purchase club for $3.00 to buy them. Write the cost model equations for both stores and find the number of cans that makes the costs equal.
<pre>Cost of 1 can at the 1st store: {{{10/8}}}, or $1.25
Cost of 1 can at the 2nd store: {{{6/5}}}, or $1.20


Let number of cans that'll make the 2 stores' costs equal, be C
Then: {{{highlight(highlight(1.25C = 1.2C  + 3))}}}
1.25C - 1.2C = 3
.05C = 3
C, or number of cans that'll make the 2 stores' costs equal = {{{3/.05}}}, or {{{highlight_green(60)}}}