This can be written as an equation
On the one side we have:
4s which means 4 x the age of my son.
This is the same as
2s+20 which means in 20 years I will be 2 x the age of my son.
Since I and my son do not change, both statements must be true so:
4s = 2s+20
We need to find s, so rearrange to get s on one side on its own:
4s - 2s = 20
2s = 20
s = 20 / 2
s = 10
My son is 10 years old.
To check this is correct use the answer in both the original statements to see if they are still true.
4 x 10 = 40 years. I am 40 years old.
in 20 years my son will be 30 and I will be 60. I will then be twice as old as my son.
Twice, with six left over.
Twice with a remainder of twenty two
Two times. Nine goes into twenty-two twice with a remainder of four.
63 goes into 148 twice with a remainder of twenty-two
For a rectangle, calculate twice the length, plus twice the width.For a rectangle, calculate twice the length, plus twice the width.For a rectangle, calculate twice the length, plus twice the width.For a rectangle, calculate twice the length, plus twice the width.
15
Twice, with six left over.
Twice with a remainder of twenty two
Two times. Nine goes into twenty-two twice with a remainder of four.
twenty
Two twenty-seven times or twenty-seven twice, three eighteen times or eighteen thrice, and six nine times or nine six times.
63 goes into 148 twice with a remainder of twenty-two
13 goes into 26 twice and 39 three times.
Twenty more than twice a number is 52
For a rectangle, calculate twice the length, plus twice the width.For a rectangle, calculate twice the length, plus twice the width.For a rectangle, calculate twice the length, plus twice the width.For a rectangle, calculate twice the length, plus twice the width.
Leo must be 18. If Leo is twice as old as martin and three times older than mike and the sum of the ages is 33, then martin would be 9 and mike would be 6, making Leo 18.
The numbers are: 7 and 13