PLEASEEEEEWhich of the following systems of equations has no solution?
18x - 6y = 14; 3y = 9x - 7
7x - 4 = 3y; 6y - 3 = 14x
4x - y = 10; 2y = 8x - 2
-5y = x - 6; 3x - 15y = 9

Question

PLEASEEEEEWhich of the following systems of equations has no solution? 
    18x - 6y = 14; 3y = 9x - 7 
   7x - 4 = 3y; 6y - 3 = 14x 
   4x - y = 10; 2y = 8x - 2 
   -5y = x - 6; 3x - 15y = 9

valpey · Answer

You are looking for a pair where the relative proportion of the x and y coefficients are equal (meaning two lines which are parallel and therefore never meet).

anonymous · Answer

so it would be the 3rd one right

valpey · Answer

Good. The third one has two parallel lines with different intercepts. Note that the first one is two parallel lines, but the same intercept (so they are really the same line.)