Question

Solve the following system of equations using elimination:
3x + 5y = 4
4x + 2y = -18

Answer 1

Ok we need to eliminate the x or the y which one shall we do?

Answer 2

The x.

Answer 3

Great now to eliminate the x we need to make it a negative in one of the equations and it must be equal to the positive value in the other equation.

Answer 4

So lets multiply the top equation by -4 and the bottom equation by 3. What do we end up with?

Answer 5

Is it (-7,5)?

Answer 6

@nelsonjedi

Answer 7

Multiply the top equation by -4 and you get -12x-20y=-16. You have to multiply each part of the equation by -4. So what would you get if you multiply the second equation by 3?