Answer: z=2.8
This is how I do!
Step-by-step explanation:
51-2z-8z=23
We simplify the equation to the form, which is simple to understand
51-2z-8z=23
We move all terms containing z to the left and all other terms to the right.
-2z-8z=+23-51
We simplify left and right side of the equation.
-10z=-28
We divide both sides of the equation by -10 to get z.
z=2.8
