4x + 15 = x + 8

Evaluate to determine the number of solutions.

$$\frac{1}{4}\left(x\ -7\right)\ =\ 1\ +\ 3x$$  

Evaluate to determine the number of solutions.

1.5d + 3.25 = 1 + 2.25d

Evaluate to determine the number of solutions.

5 (x + 3) + 6 = 5x + 9

Evaluate to determine the number of solutions.

5x - 15 + 6 = 5x - 10

Happy Paws charger $19.00 plus $1.00 per hour to keep a dog during the day. Woof Watchers charges $14.00 plus $2.75 per hour. Determine which equation is written correctly to determine how many hours it would take for the services to equal the same amount?

Cell phone company A charges $20 per month plus $.05 per text message. Cell phone Company B charges $10 per month plus $.07 per text message. Is there any number of text messages that will result in the exact same charge from both companies.

Two cars are traveling in the same direction. The first car is going 40 mph and the second car is going 55 mph. the first car left 3 hours before the second car. Which equation could you solve to find how many hours it will take for the second car to catch up to the first car.

Greg and Jane left a 15% tip after dinner. The amount of the tip was $9. Greg's dinner cost $24. Which equation can you use to find x, the cost of Jane's dinner?

-5 - 9x = 3 (1 - 3x) - 8

Select all equations that have infinitely many solutions.

Which statement about the equation is true?

5 (d + 11) = 2 (d - 19)