Question

Help please, explain how and what you did thank you!!

Answer 1

x - 4y = -10

2x - 4y = -8

-------------------------subtract

-x = - 2

x = 2

Substitute x = 2 into x - 4y = -10

2 - 4y = -10

-4y = - 12

y = 3

Answer

Solution: x = 2 , y = 3 or (2 , 3)

Answer 2

(2,3)

Explanation:

Because both equations involve the y-term -4y, elimination by addition/subtraction is a good choice as we solve this system of linear equations.

Multiply the 1st equation by -1, obtaining -x + 4y = 10; then add the 2nd equation to this result:

-x + 4y = 10

2x - 4y = -8

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

x = 2

Next, find y. Substitute 2 for x in the first equation: 2 - 4y = -10. Subtract 2 from both sides, obtaining -4y = -12. Then y = 3.

The solution is (2,3).