Answer:
C. {-9,-3}
Step-by-step explanation:
gives 
if 
. This gives 
, which is valid.
It can also give 
if 
. This gives 
, which is valid.
Hence the solutions are 
.
Answer:
x = -3
Step-by-step explanation:
2x-x=-5+2
x = -3
Answer:
18
Step-by-step explanation:
Product of 7 and a number is 126.
Let's form the equation,
→ 7 × x = 126
The required value of x will be,
→ 7 × x = 126
→ x = 126/7
→ [ x = 18 ]
Hence, the number is 18.
Answer: True
Think of a 3D box. It has 6 faces and the surface area is the total of all six individual rectangular faces. This idea applies to any polyhedron.
