Solve the following system of equations by elimination: 3x + 2y= 8 x + y= 2.
A. x= -4 y= -2
B. x= 4 y= -2
C. x= 4 y= 1
D. x= 6 y= 3

Question

Solve the following system of equations by elimination: 3x + 2y= 8 x + y= 2. 
	A.	x= -4 y= -2 
	B.	x= 4 y= -2 
	C.	x= 4 y= 1 
	D.	x= 6 y= 3

anonymous · Answer

Are those two different equations? As in 3x+2y=8 and x+y=2

cenaida · Answer

yea i think so

solomonzelman · Answer

3x + 2y= 8
x + y= 2     ---> times (-3)  ---> -3x-3y=-6

So,

3x + 2y= 8
-3x-3y=-6
---------               ADD
0x-y=2

y=-2

solomonzelman · Answer

Solve for x by plugging in y.
x + y= 2 
x + (-2)= 2 
x=4

solomonzelman · Answer

makes sense?

cenaida · Answer

yesss then its B thanks again!!

solomonzelman · Answer

Anytime, I wish all subjects were same hard as math....

wolf1728 · Answer

A) 3x + 2y= 8 
B) x + y= 2

Multiply Equation B by -2
B) -2x -2y = -4  Adding this to 
A) 3x + 2y = 8
x = 4
putting this in equation B
4 + y = 2
y = -2

solomonzelman · Answer

Yes same thing, you are eliminating y I eliminated x.

wolf1728 · Answer

I always like it when I am working on a problem, along with someone else, that the answers come out exactly the same.  All right!!