Look at where the lines intersect each other, if they do then you can use one of the coordinates. the lines that don’t touch means no solution
Answer:
-3a + 4ab
Step-by-step explanation:
-5a + 2a = -3a
-6ab + 10ab = 4ab
Answer:
C. 
Step-by-step explanation:
Given:

Add the two equations, we get

Therefore, the correct option is option C.