

I think that's what your looking for
Answer:
a+51=90
a+51+90=180
39
Step-by-step explanation:
hope this helped :)
You can tell if you make the denominators the same easiest one is 30 for 6 and 5
1/5=6/30
1/6=5/30
now you can see which is bigger
1. incorrect
2. correct
3. incorrect (?)