Given:
15 is decreased by three times a number, the result is 21.
To find:
The equation for the given statement and solve it.
Solution:
Let n be the unknown number. Then,
Three times of a number =
15 is decreased by three times a number =
It is given given that the result after subtraction is 21. So,
Divide both sides by -3.
Therefore, the required equation is and its solution is . Hence, the correct option is (a).
3(2n-9) is the equation that is equivalent to 6n-27.
Answer:
55-21=34
50-20=30
Step-by-step explanation:
hope i helped out :)
The answer would be A. 3. This is because you set both measurements equal.
(4x+9)=21
-9. -9
4x=12
X=3