85 = 10x+15
70 = 10x
x = 7
180-85 = 95 = z
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
Answer:
the questions is not too correct
the answer is 20
1/10 of 200 is 200* 1/10 = 200/10 which is 20
Answer:
see down
Step-by-step explanation:
