The value of x, y and z from the system of equation are -1, -8 and 5 respectively.
Data;
- -2x + 6y + 3z = -31
- -3y + 7z = 59
- 2z = 10
<h3>System of Equation</h3>
To solve this problem, we have to solve the system of equation using substitution method.
From equation (iii)

let us substitute the value of z into equation (ii)

Let's substitute the value of x and y into equation (i)

From the calculation above, the value of x, y and z are -1, -8 and 5 respectively.
Learn more on system of equations here;
brainly.com/question/14323743
The answer is B.
Hope that helped! :)
A. 8/$12=21/$x then cross multiply.
B. 1/$1.5
Answer:
3
Step-by-step explanation:
there you go pal :)))))
Answer:

Step-by-step explanation:
