Question

Which is not a linear equation..and how do I figure it out -4v+2w=7, x/4=y, x=-5, 2/x +3/y=6

Answer 1

These are all linear equations, because all of the variables are raised to the positive FIRST power:  -4v+2w=7, x/4=y, x=-5

The last equation, 2/x +3/y=6, is not linear, because the powers of the variables are negative:   

2x^(-1) + 3y^(-1) = 6 NON LINEAR