Question

What is the result of adding these two equations? 2x + 7y= 4 - 2x – 8y = -2

Answer 1

Answer:

x=9

y=-2

Step-by-step explanation:

(2x+7y)+(-2x-8y)=4+(-2)

2x+7y-2x-8y=2

7y-8y=2

-y=2

y=-2

sub y=-2 in to 2x+7y=4

2x+7×-2=4

2x-14=4

2x=4+14

2x=18

x=9

Answer 2

Answer:

-y = 2.

Step-by-step explanation:

2x + 7y= 4

- 2x – 8y = -2  

 Adding we eliminate   x because 2x + -2x = 0:-

0 - y = 4  + -2

-y = 2.