Simplify the expression below. show your work.
3x - 9b-3 (4b - 3) - x

2x-21b+9

Step-by-step explanation:

3x-9b-3(4b-3)-x

3x-9b-12b+9-x

3x-x-9b-12b+9

2x-21b+9

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)