Question

A system of equations has no solution. If y= 8x + 7 is one of the equations which could be the other equation?

y= 8x+7
y = 8x-7
y=-8x+ 7
y=-8x-7

Answer 1

y = 8x - 7

Explanation:

If two equations are the same, then the system of equations has infinitely many solutions.

If two equations different only constant number, then the system of equations has no solution (coefficient at x in both equations is the same and coefficient at y is the same).

Therefore for y = 8x + 7 other equation is y = 8x - 7.