All you have to do is move the denominator on the other side, by multiplying.
a-10
------- = -9
20
multiply 20 x -9
= -180
then it becomes a-10=-180
+10 +10
a=-170
Answer:
0.253
Step-by-step explanation:
since it is greater than 0.243
I'm pretty sure that it is C. 12
17 by 2 because 34 divided by 2 is 17