Question

PLEASE HELP!

which of these is an example of a literal equation?
A. 2x + 7y
B. ax - by = k
C. 4x + 7 = 22
D. 5 + 20 = 5^2

Answer 1

B. ax – by = k

In this scenario there is nothing in particular to solve for, except another variable in terms of the remaining four variables. A literal equation typically only asks to solve for a given variable (isolate it).

Answer 2

B.
`ax - by = k`

Explanation:

We know that,

Literal equation is an equation having atleast two variables which represents the real values.

So, according to the options, we have,

A.
`2x + 7y`

Though it contains two variables, it is not a literal equation as it is just an expression and not an equation.

C.
`4x + 7 = 22`

Since, it contains only one variable and a literal equation needs atleast two variables.

So, it is not a literal equation.

D.
`5 + 20 = 5^2`

Since, it does not contain any variable and a literal equation needs atleast two variables.

So, it is not a literal equation.

Finally, we see that,

B.
`ax - by = k`

This equation consists of two variables x, y which represents any real value.

Thus, it is a literal equation.

Hence, option B is correct.