Question

determine whether 2x-y=15 ,4x-2y=18 unique/no/infinity many solutions

please give me the correct answer please gI've me the correct answer​

Answer 1

Answer:

here first find the ratios of each coefficient and constant term , that is,

A1/A2= 2/4=1/2

b1/b2= (-1)/(-2)=1/2

C1/C2= 15/18= 5/6

so here ,

A1/A2= b1/b2 ≠ C1/C2

therefore, these pair of equations will have no solution.