Answer:
x=3,y=-10
Explanation:
First, we add 21 to both sides of the first equation
13x=-21-6y
+21 +21
13x+21=-6y Now divide by -1 to make it positive
/-1 /-1 /-1
-13x-21=6y
Now we have to subtract 36 on both sides of the second equation
-8x=36+6y
-36 -36
-8x-36=6y
Since both equations equal 6y we can solve the equation by making them "equal" each other
-13x-21=-8x-36 Add 36 to both sides
+36 +36
-13x+15=-8x Add 13x to both sides
+13x +13x
15=5x Divide by 5
/5 /5
x=3
Now use the x value to solve
13(3)=-21-6y
39=-21-6y Add 21 to both sides
+21 +21
60=-6y
/-6 /-6
y=-10
Hope this helped!