SOLUTION: 2x+y=2 4x+y=4 If you multiply one of these by -1, the Ys will cancel, enabling you to solve it for x: -1(2x + y = 2) --> -2x - y = -2 4x + y = 4 --> 4x + y = 4

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: 2x+y=2 4x+y=4 If you multiply one of these by -1, the Ys will cancel, enabling you to solve it for x: -1(2x + y = 2) --> -2x - y = -2 4x + y = 4 --> 4x + y = 4       Log On


   

Question 85531: 2x+y=2
4x+y=4
If you multiply one of these by -1, the Ys will cancel, enabling you to solve it for x:
-1(2x + y = 2) --> -2x - y = -2
4x + y = 4 --> 4x + y = 4
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2x = 2
x = 1
Now plug 1 in for x into either of the original equations to get y:
2(1) + y = 2 [using the first eqution]
2 + y = 2
y = 0
The solutoin is (1 , 0)
Answer by scianci(186) About Me  (Show Source):