Solve the systems of equations

x + 3y = 32
-3x + 2y = 3

and

x + y = 5
x - y = -9

Question

Solve the systems of equations

x  + 3y =  32
 -3x  + 2y =  3

and

x + y =  5
x - y =  -9

anonymous · Answer

x=32-3y pluggin this in the 2nd eq.
-3(32-3y)+2y=3
-96+9y+2y=3
11y=3+96
y=99/11=9 pluggin y=9 in any of the two eq we get x=5

anonymous · Answer

y=9
x=5

anonymous · Answer

x = -2
y=7

anonymous · Answer

proceed the same way for the second Q... try it..its vry easy

anonymous · Answer

Thanks so much for the help!

anonymous · Answer

no probs

anonymous · Answer

Ok i did the second problem and got y = -5 here is my work can you tell me where i went wrong?  x + y =  5
x = 5- y
x - y =  -9
(5-y) –y = -9
-5y-y = -9
-4y = -9
y = -5

anonymous · Answer

(5-y) –y = -9
check it from here
(5-y) –y = -9
5-y-y=-9
the two -y add to give -2y
5-2y=9
2y=5-9
y=-4/2=-2
did you understand?

anonymous · Answer

Ah I see now...  i'm really terrible at math, don't know why it's so hard for me to grasp.  Thanks again!

anonymous · Answer

keep practicing.. thats the only way to  success=)