When x = - 0.5, the bivariate linear equation 2x-y = 3 has the same solution as KX + 2Y = - 1? Emergency

When x = - 0.5, the bivariate linear equation 2x-y = 3 has the same solution as KX + 2Y = - 1? Emergency

x=-0.5
y=2x-3
=-1-3
=-4
-0.5k+2×(-4)=-1
-0.5k=7
k=-14