Answer:
C 0 solutions
Step-by-step explanation:
8x+47 = 8(x+5)
Distribute
8x+47 = 8x+40
Subtract 8x from each side
47 = 40
This is never true so there are no solutions
<u><em>This would be k < 50.</em></u>
This inequality states that k, the price at which Nita wants to buy the new keyboard, is less than 50 dollars.
Literal equation:
we know that
literal equation is equation of more one variable
for example: 
And we can solve such equations only if we are given two such equation
because it has two variables
One variable equation:
such equation has single variables
for example:

we don't need any other equation
we can solve for variables from single equation itself
because it has only one variable that is x
The first one is 621 and the second one is C