-11x-10y=17
5x-7y=50
What do I do?

Question

-11x-10y=17
5x-7y=50
 What do I do?

hero · Answer

Multiply both sides of the second equation by 2:
Then you'll have the following system:

-11x - 10y = 17
  10x - 14y = 100

Afterwards combine them together:

-x -24y = 117

Next isolate x:
x = -24y - 117

Then substitute the expression for x into one of the original equations: 

5(-24y - 117) -7y = 50

-120y - 585 - 7y = 50

Then continue solving for y
-120y - 7y - 585 = 50
-(120 + 7)y = 585 + 50
-127y = 630
y = 635/-127
y = -5

From there, try solving for x

anonymous · Answer

does x = 17 ?

hero · Answer

No, $x \ne 17$

hero · Answer

$-11x -10(-5) = 17$
$-11x + 50 = 17$
$-11x + 50 - 17 = 0$
$-11 x+ 33 = 0$
$33 = 11x$

$\dfrac{33}{11} = x$

anonymous · Answer

Oh ! I plugged in -5 to the second equation and I forgot two negatives make a positive so x will equal 3