SOLUTION: 2x+2y=4 4x+2y=-8 How will be this equation will solved by matrix inverdion method

Question 1012562: 2x+2y=4
4x+2y=-8
How will be this equation will solved by matrix
inverdion method
Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
2x+2y=4 Let's subtract this from the next.
4x+2y=8
---------------------------
4x+2y = 8
-+2x+2y = 4
2x----= 4
x = 2
--------------------------------------------
Now find y:
2x+2y= 4
2(2)+2y= 4
4+2y= 4
2y= 0
y= 0
------------------------------------------
Check:
2x+2y= 4
2(2)+2(0)= 4
4+0= 4 this is correct. Let's try the next one:
------------------------------
4x+2y = 8
4(2)+2(0) = 8
8+0 = 8 this is also correct. We have the right answer:
x = 2
y = 0

RELATED QUESTIONS
3x � 2y + 3z = 8 2x + y � z = 1 4x � 3y + 2z = 4 solve by... (answered by richwmiller)

This needs to be solved by the elimination method. 5x + 2y= -3 4x - 2y= -6 The... (answered by mathmartian)

Can someone help me solve this? Solve the system by the substitution method. 4x+2y=-8... (answered by jim_thompson5910)

Please help me solve this system of equations: Directions: Solve using elimination and (answered by MathTherapy)

Please help!!! I don't understand any of this. Any assistance you can provide will be... (answered by funmath)

Solve the following set of equations by using matrix method 4x+2y+3z = 4 5x+6y+z=... (answered by MathLover1)

Solve this pair of simultaneous equations by the elimination method: 4x + 2y = -8 x -... (answered by mananth)

8x+2y=-10 4x+y=-5 This cannot be solved, as the 1st equation is the same as the 2nd... (answered by Alan3354)

2x+2y=8... (answered by macston)