Jack bought 3 slices of cheese pizza and 4 slices of mushroom pizza for a total cost of $12.50. Grace bought 3 slices of cheese pizza and 2 slices of mushroom pizza for a total cost of $8.50. What is the cost of one slice of mushroom pizza?

a) $1.50
b) $2.00
c) $3.00
d) $3.50

Question

Jack bought 3 slices of cheese pizza and 4 slices of mushroom pizza for a total cost of $12.50. Grace bought 3 slices of cheese pizza and 2 slices of mushroom pizza for a total cost of $8.50. What is the cost of one slice of mushroom pizza?

a) $1.50
b) $2.00
c) $3.00
d) $3.50

amistre64 · Answer

3c + 4m = 12.50
3c + 2m = 8.50

  3c + 4m = 12.50
-3c   -2m = -8.50
------------------
         2m = 4.00 
           m = 2.00