Answer:
30
Step-by-step explanation:
Problem = 3x + 21 for x=3
3(3) +21 --- subsitute the three for the x
9 + 21 ---- multiply the 3s together
30 ----- add
This is a true statement.
its Bbe588322
asappppo
i think its 0.9994225
just subtract the 8.75136.24 bye 7.75193. and there you go.