Question

I think I multiply the 1st equation (-5y) by 2 and the 2nd equation (+2y) by 5
http://prnt.sc/dlw0hf

Answer 1

to eliminate the y terms

Answer 2

u have to have the same number of ys in both equations

Answer 3

negative or positive

Answer 4

Wouldnt a positive and a negitive eliminate eachother? and that's the point, right?

Answer 5

one way is to multiply the top by 2
And the bottom equation by 5

Answer 6

you are almost correct but the 2 or the 5 needs to have a negative.

Answer 7

Is doesn't matter which one is negative?

Answer 8

no 2 and 5 is right

Answer 9

no need to have negative

Answer 10

oh yes ! sorry

Answer 11

Is my answer right or do I need a negative?

Answer 12

its right if u want to add both equations

Answer 13

what welshfella said is not wrong either, u just have to subtract the equations then

Answer 14

That's the point, adding I mean. :)

Answer 15

ya its good then :)

Answer 16

Gracias

Answer 17

Yes. It is generally easier to add when you have a negative number . Some people get confused with double negatives.