Answer:
-5
Step-by-step explanation:
3x4=12
3x1=3
12y+3
15-20=
-5
Answer/Step-by-step explanation:
2x-5y=9
Add 5y to both sides of the equation.
2x=9+5y
Divide each term by 2 and simplify.
Divide each term in 2x=9+5y by 2

Cancel the common factor of 2.
Divide x by 1.

----------------------------------------------------------------------------------------------------------------
3x+4y=2
Add 4y to both sides of the equation
3x=2+4y
Divide each term by 3 and simplify.
Divide each term in 3x=2+4y by 3.

Cancel the common factor of 3.
Divide x by 1.


Answer:
I'm not sure if I'm right but my best answer is C
Huh? I’m not sure I understand what I just said...
Answer:
x=30
Step-by-step explanation:
Since the measure of an exterior angle is equal to the sum of any two angles in a triangle, the equation would be 4x-18=2x+6+36. Solve this, and we get x=30.
Hope this helped!