Question

. What does it mean when solving an equation and your last line is 7 = 7?
A. It is impossible, I must have done something wrong.
B. It is a true statement and an identity, which means there are infinitely many solutions
C. It is a false statement, which means there are no solutions.
D. It is impossible, there is no variable in the last line.

Answer 1

i think c or d again

Answer 2

since \(7=7\) is a true statement, your equation is always true

Answer 3

b

Answer 4

and equation that is always true is called an identity, like for example
\[2(x-1)=2x-2\]

Answer 5

yeah, b