Solve the system by elimination

2x+7y=1

2x-4y=12

x = 4 y= -1

Step-by-step 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

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.