Answer:
The work is on the picture
sorry was not letting write the work here
Step-by-step explanation:
Answer:
20
Step-by-step explanation:
x+2x+x+10=90
4x=80
x=20
give brainliest please
Answer:
A
Step-by-step explanation:

means that xy is being multiplied with itself thrice.
Hence,

Answer:
c = 9
Step-by-step explanation:
-2c = -18
/-2 /-2 (Divide both sides by -2)
_______
c = 9