an apple cost 3x+6 pesos while an orange cost 4x-5 pesos. what is the total cost of 1 dozen apples and half dozen of orange
$$1\ dozen = 12$$
$$1/2 \ dozen = 6$$
dozen(apples)
12(3x+6)
36x+72
1/2dozen(oranges)
6(4x-5)
24x-30
dozen apples + 1/2dozen oranges
(36x+72) + (24x-30)
(36x+24x) + (72-30)
60x + 42
So our answer is 60x + 42 pesos.
If we knew the value of x, we could find the exact cost. We don't though, so this is our final answer.