Which best explains why the equation 7x + 3 = 7x + 3 has infinitely many
solutions?

because no matter what x is, the equation on both sides are the same

Step-by-step explanation: for example we will replace x with 5

7(5) + 3=7(5) + 3

7 times 5 equals 15, plus 3 equals 18, now lets look at the other side, 7 times 5 equals 15, plus 3 equals 18, there fore u could use the number 777,777,777 and you would get the same answer on both sides

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

answer:

c) the x-coordinate of the center of the circle increases by 3