Question

Solve by the multiplication with add and subtract method
3x - 2y = 12
2x + y = 1

Answer 1

first multipy the second equation by 2
[2x+y=1]*2
4x+2y=2
then add the resulted equation with the first equation
3x-2y=12
+
4x+2y=2
---------
7x=14
divide by 7
x=14/7
x=2
plug in the value of x=2 in one of the equations
2(2)+y=1
4+y=1
y=1-4
y=-3