Question

Solve 45 – 4r = 45 – 4r A. 1 B. 4 C. no solution D. all real numbers

Answer 1

I think the answer is D all real numbers.

45 - 4r = 45 - 4r

you end up with 0 = 0

proving that any number that goes in r proves that its still going to be 0 = 0