What is the solution to the equation?
z – (–1.5) = –2.3

The solution is z=-3.8 I found the answer by adding the -1.5 by -2.3

Well, a double negative equals a positive, so the equation would become:
z + 1.5 = -2.3
So then you subtract 1.5 from both sides to get z by itself.
z = -3.8

So, z = -3.8

The variables should add up to equal 1