Verified answer

If we let x be the cost of a 10X14 and y be the cost of an 8X10 we get the following two equations:

x+10y=239.50

x+5y=134.50

We can rearrange the second equation and get:

x= 134.50 - 5y

Substitute and get:

134.50 - 5y +10y=239.50

rearrange for y

y= (239.5-134.50)/5

y=21

assuming the pictures cost the same regardless of package.

5 8x10 and 1 10x14 = 134.50

but 5 more 8x10 increases the cost to 239.50, the difference is 105.00 for 5 8x10, so an 8x10 would be $105/5 or 21$

One 8x10 is $21 and one 10x14 is 134.50-105 or $29.50

To prove:

then 5x21=105+29.50 for the 10x14 or 134.50 for package 2

10 times 21=210 + 29.50= 239.50 for package 1