I will give brainliest

Answer:
Garage A- 3x12+10=46
Garage B- 4x12+3=51
Garage A is $5 cheaper than Garage B when parking for 12 hours
Step-by-step explanation:
You plug in the variables given to each garage into y=mx+b. Both Garage A and B have a constant (A-$10, B-$3). X in this equation would be the number of hours and m is the amount charged per hour.