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 a remainder of twenty two
Twice, with six left over.
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 a remainder of twenty one
Twice with a remainder of twenty two
Twice, with six left over.
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.
The numbers are: 7 and 13