-4x-2y=20
2x+y=19

this is a systems using elimination

Question

-4x-2y=20
2x+y=19

this is a systems using elimination

shadowlegendx · Answer

Do you know how to do elimination?

mgraham3641 · Answer

kind of we have been learning it for only like 2 days

shadowlegendx · Answer

Have you guys gone over one solution, infinite solutions, and no solutions?

mgraham3641 · Answer

yes

shadowlegendx · Answer

Good, I'll show you why I asked that

shadowlegendx · Answer

First step to elimination, is cancelling out one variable. The first thing I see is -4x and 2x, which is perfect. Our negative is already lined up.

$$-4x - 2y = 20$$

$$2x + y = 19$$

Multiply the second equation by 2

$$-4x - 2y = 20$$

$$4x + 2y = 38$$

Add the two equations

Both x and y cancel

$$0 = 58$$

mgraham3641 · Answer

give me a little bit to figure this out

shadowlegendx · Answer

What part are you confused on?

mgraham3641 · Answer

im not really confused its just a lot of numbers

mgraham3641 · Answer

and we really never learned to multiply the equations ?

shadowlegendx · Answer

Do you understand why we're allowed to multiply the equations?