Question 19795
3x+2y=17.....[1]
x-y=-1.......[2]
<P>
multiply eqn[2] by 2
3x+2y=17
2x-2y=-2
<P>
Add up both the equations:
3x+2y+(2x-2y)=17+(-2)
5x=17-2
5x=15
x=3
<P>
x-y=-1
-y=-1-x
-y=-(1+x)
y=1+x
y=1+3
y=4
<P>
x=3,y=4
<P>
-xC