Question

k+1=3k-1

Answer 1

k+1=3k-1 (subtract 1 from both sides)
k+1-1 = 3k-1-1
k = 3k-2 (subtract 3k from both sides)
k-3k = 3k-2-3k
-2k = -2 (divide -2 by both sides)

-2k/-2 = -2/-2
k = 1

Answer 2

How do you check your answer?

Answer 3

You take the original equation, k+1=3*k-1 and insert the value we found, k = 1.

(1) + 1 = 3*(1) - 1, then solve, and if both side equal the same number, you have the correct answer. In this case, 2 = 3 - 1, which reduces to 2 = 2.