Answer:
Step-by-step explanation:c,b
Hello.
First of all, let the number be t.
8 times t can be written like this:

Notice that the number is before the variable and the times sign (×) is not there.
We can write it as 8×t, but we usually write it as 8t.
The sum of means we add:
8t+21
Now, "less than" is "<" :

Therefore, the answer is

I hope it helps.
Have a nice day.

Answer:
4_5=_1 then -1 is <25 25_1 25<-1
Answer:
x = 
Step-by-step explanation:
Given
6x =
( divide both sides by 6 )
x =
=
×
=
= 
X/9=1
Multiply both sides by 9. So x=9.