when i use elimination to solve a system of equations, what do i do if there is nothing to eliminate?
ex. 5x+4y=-6
3x-3y=4

Question

when i use elimination to solve a system of equations, what do i do if there is nothing to eliminate? 
ex. 5x+4y=-6
      3x-3y=4

anonymous · Answer

you can always eliminate
ex multiply the first line by 3 and the second by -5

anonymous · Answer

oh ok, i didn't know that you could multiply by two different numbers

hero · Answer

Alternative Hint:
$y = -\large\frac{6 + 5x}{4}$
$y = -\large\frac{3x - 4}{3}$

hero · Answer

Solve each for y, then set y = y and cross multiply

hero · Answer

So

$\frac{6 + 5x}{4} = \frac{4 - 3x}{3}$

3(6 + 5x) = 4(4-3x) then continue solving for x