Question

@igreen same concept
x-2y=8
2x+y=7

Answer 1

@AnswerMyQuestions

Answer 2

Okay, so let's add 2y to both sides in the first equation:

x - 2y = 8

x = 2y + 8

Now we can plug in 2y + 8 for 'x' in the 2nd equation:

2x + y = 7

2(2y + 8) + y = 7

Distribute 2 into the parenthesis:

4y + 16 + y = 7

Add 4y + y, what do you get?

Answer 3

5y?

Answer 4

Yes, so we have:

5y + 16 = 7

Subtract 16 to both sides.

Answer 5

-9? that dosen't seem right to me

Answer 6

Yes, that gives us:

5y = -9

Answer 7

Divide 5 to both sides.

Answer 8

What's -9 / 5?

Answer 9

And yes, this is right.

Answer 10

1.8

Answer 11

-1.8

Answer 12

Yes, that's correct, so that's our y-value.

Plug it into any equation:

x - 2y = 8

x - 2(-1.8) = 8

Multiply:

x + 3.6 = 8

Subtract 3.6 to both sides, what do you get?

Answer 13

What's 8 - 3.6? @priea

Answer 14

4.4

Answer 15

Yes, so our final answer is (4.4, -1.8).

Answer 16

are u sure? I got that wrong on my end

Answer 17

Yes, I am 100% sure..last time we added something wrong.

Answer 18

okay well thanks. ill be sure to ask u for help next time @iGreen.

Answer 19

No problem, sorry about last time.