Answer:
Problem 8 is No and Problem 9 is Yes
Answer:

Step-by-step explanation:
15). Given equation is,

Multiply the equation by 8,


Subtract
from both the sides of the equation,


Therefore, value of the variable 'y' will be,

Answer:
12 x 9 = 108
Step-by-step explanation:
X=13+4x. 13+4x=22
0=13+3x. 4x=9
3x=-13. x=9/4
x=13/3