Question

5(z - 4) - z = 4z - 20
a.) 4
b.) -4
c.) infinitely many solutions
d.) no solution

Please help ASAP. Thanks! (:

Answer 1

5z - 20 - z = 4z - 20
4z - 20 = 4z - 20

Since both sides are identical, we say that all real numbers z works for this equation. Choice (C) is corrected, there are an infinite number of solutions...namely, all real numbers.

Answer 2

5z - 20 -z = 4z - 20

4z - 20 = 4z - 20

both sides are exactly the same, infinitely many solutions.