12t - 4-7t = 5t-4 a. No solution
b. One solution
c. Two solutions
d. Infinitely many solutions

infinitely many solutions

Step-by-step explanation:

12t-5t=7t-7t=0=-4t=-4, 4+-4=0 so 0=0

$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)