Question

How do you solve `y = 1 - 5x` and `5x + y = 8` using substitution?

Answer 1

No solution.

Explanation:

You take the value of one variable in one equation and put it in other. Here as `y=1-5x`, putting it in `5x+y=8` gives us

`5x+1-5x=8` or `1=8`. As this is not possible, there is no solution.

In fact if you draw equations of these two lines on graph, they will show up as two parallel lines, not intersecting each other and hence no solution.