Question

Describe and correct the error in solving the equation -1.5+k=8.2
k=8.2+(-1.5)
k=6.7

Answer 1

-1.5 + k is the same thing as k - 1.5

and if we want to get k all by itself, we need to add 1.5 on both sides, not add -1.5

so

-1.5 + k = 8.2
-1.5 + 1.5 + k = 8.2 + 1.5
k = 8.2 + 1.5
k = 9.7