Answer:Jason is 5 years old.
John is 4 years old.
Jackson is 12 years old.
Step-by-step explanation:
Let x represent the age of Jason.
Let y represent the age of John.
Let z represent the age of Jackson.
The ages of three siblings Jason John and Jackson totals 21 years. It means that
x + y + z = 21 - - - - - - - - - - -1
Jason is one year older than John. It means that
x = y + 1
Jackson is three times as old as John. It means that
z = 3y
Substituting x = y + 1 and z = 3y into equation 1, it becomes
y + 1 + y + 3y = 21
5y = 21 - 1 = 20
y = 20/5 = 4
x = y + 1 = 4 + 1
x = 5
z = 3y = 3 × 4
z = 12
Answer:
D
Step-by-step explaniation
See what can be going into that number by multiplication or division
Well you are going to need a rule or formula like x + 6 or 3 (x) + 2
Example:
Input x + 6 Output
2 2+ 6 8
4 4+6 10
6 6+6 12
Hope this helps sorry if it doesn’t
That is easy the answer is -30
tell of i am right
