Question

x+2y=-1; 2x-3y=12 solve the following simultaneous eqn using cramers rule

Answer 1

x=-1-2y
2x=12+3y
=x=12+3y/2
compare the value of x
-1-2y=12+3y/2
(-1-2y)2=12+3y
-2-4y=12+3y
-2-12=3y+4y
-14=7y
y=-14/7
y=-7
according to question
x+2y=-1
x+2(-7)=-1
x=-1+14
x=13