Answer:
D. 
Step-by-step explanation:
The given expression is;

This is the same as;

The denominators are the same.
Subtract the numerators and write one denominator;

Rewrite to get;

Answer:
x= 15
Step-by-step explanation:
4x+15=75
4x = 60
x = 15
Answer:
8, 6.
x=8 y=6
Step-by-step explanation:
-3 + 11 = +8
-5 + 11 = +6
adding two negative integers always yields a negative sum