Question

Will Medal and Fan


Solve, using linear combination.


4x + y = 5
3x + y = 3


(0, –3)
(0, 5)
(2, –3)
(–3, 7)

Answer 1

@nincompoop ?

Answer 2

@pooja195 ?

Answer 3

You can subtract equation 2 from equation 1 to get


4x + y = 5
3x + y = 3
----------
1x + 0y = 2

solve for x and use this to find y

Answer 4

So would this be B?

Answer 5

when you isolated x, what is x equal to?

Answer 6

I'm not sure.

Answer 7

you are solving 1x + 0y = 2 for x

Answer 8

0y is the same as 0

since 0 times anything is 0

Answer 9

1x = x because 1 times anything is that same number

Answer 10

Oh, so it's C?

Answer 11

@jim_thompson5910 ?

Answer 12

when you solved for x, you got x = ???

Answer 13

I don't really understand.

Answer 14

then how did you get to the answer of C? just a random guess?

Answer 15

No I used the numbers from the answer C and put them into the X and Y spots

Answer 16

that works, you can plug each possible answer choice into the original equations

Answer 17

Thanks for the help :)

Answer 18

you should get 2 true equations, so yes, C is the answer