Question

If you wanted to eliminate the y variable by adding the two equations in the following system, what could be your first step?
3x + y = 6
4x − 5y = 10

Multiply the first equation by 5.

Multiply the first equation by −5.

Multiply the first equation by −4.

Add the two equations together.

Answer 1

1st choice

Answer 2

can you show me the work please because you gave me the same answer last time?

Answer 3

ok, if you are still there.

Answer 4

yeah

Answer 5

look, the question says you have to get the y variables elininated by adding.

the second eq has -5y.

so if the first eq had 5y, then when you add 5y and -5y you get 0 and therefore you have eliminated the y variable.

so to get 5y in the 1st eq, multiply all members of that eq by 5.

ok?

Answer 6

thanks