Question

Is it possible to use substitution to solve a system of linear equations if one equation represents a horizontal line and the other equation represents a vertical line?

Answer 1

No

One is horizontal lines

That should be in this form

• y=a

a is any number

A line is vertical

• x=b

Look at both equations

a and b are not equal plus there is no x in horizontal line and no y in vertical line.

There is nothing to substitute

The solution will come (b,a)

Answer 2

• No

Explanation:

Horizontal line:

• y = k

Vertical line:

• x = m

The intersection is (m, k)

No substitution is possible, as no variables to substitute