Answer:
9.7921
Step-by-step explanation:
Answer: infinite solutions
Step-by-step explanation: any value of d makes the equation true. By simplifying the right side, we get -d + 4, which is the same as 4 - d, so we essentially get 4 - d = 4 - d.
Step-by-step explanation:the answer is option A as 1 • 3 =3 and 3+4=7