10. Infinitely many solutions:

Simplify this equation:

When
the equation becomes

This equality is true for all x, thus the equation has infinitely many solutions.
11. The equation
should have one solution x=-1.
First, simplify the equation:

This equation will have solution x=-1 when

Therefore, the initial equation is

12. The equation
should have infinitely many solutions.
Simplify it:

When
this equation will have infinitely many solutions.
The answer of 6and7 irrational number is 6.875
Answer:
181510
Step-by-step explanation:
120,000 x1.03∧14=181510.767
Round the answer down as you can't have 0.767 of a person.