Solve each of the following systems of eqautions by the method of cross-multiplication:
x+2y+1=0
2x−3y−12=0
x=3,y=−2
Solve each of the following systems of equations by using the method of cross multiplication:
x+2y+1=0,
2x−3y−12=0.
3x+2y+25=0
2x+y+10=0
x+ay=b
ax−by=c
xa=yb
ax+by=a2+b2
x+yxy=2,
x−yxy=6