Answer:
.
Step-by-step explanation:
These questions are just a way of saying it's a two system equation. You can go about this by elimination for both of them.
-8x - 4y = -12
+ 6x + 4y = 14
---------------------
-2x = 2
/-2
x=-1
Since A is the only answer with x=-1, you technically don't have to solve for y but it is still a good idea to plug x into one of the equations and solve for y.
2x + 3y = 50
+ 4x -2y = 4
-----------------
multiply the top equation by -2 so you can eliminate your x's
-4x - 6y = -100
+4x - 2y = 4
------------------
-8y = -96
/-8
y=12
Once again, your first answer is the only one with y=12 but you should still go back through and plug things in to double check!
180-70=110 so with the remaining 110 divide by 10 to get x=11
The answer to the question is option c and d
