Question

Solve the system by elimination

2x+7y=1

2x-4y=12

Answer 1

y=-1, x=4

Explanation:

Answer 2

x = 4 y= -1

Explanation:

Solve the system by elimination by stacking the equations lining up the variables.

2x + 7y = 1

2x - 4y = 12

Next, subtract each of the like terms.

2x + 7y = 1

- 2x - 4y = 12

-----------------------

0x +11y = -11

y = -1

Then substitute y = -1 into one of the equations.

2x + 7(-1) = 1

2x - 7 = 1

2x = 8

]x = 4