Question

40x+20y=-7
16x-50y=13

Elimination method im stuck on this one really bad

Answer 1

what is lcm of 20 and 50?

Answer 2

Multiply every term in the top equation by 5.
Multiply evcery term in the bottom equation by 2.

If you plus the two equations together you will ELIMINATE the y.

Once the y is gone you can solve this like a normal equation, then substitute your answer for x back into one of the other equations.

HOpe this helps, let me know if you need me to walk it through with you.

Answer 3

multiply top by 2 and a half, add the equations.