Mrs Lim is m years old. She gave birth to her son when she was 20 years old. What will their total age be in 12 years' time?
at present, their age total is m + (m-20) = 2m-20
In 12 years, they will each be 12 years older, so add 24 to the total: 2m+4
To find out the total age of Mrs Lim and her son in 12 years' time, we need to determine the current age of Mrs Lim's son. We can start by analyzing the given information.
We know that Mrs Lim gave birth to her son when she was 20 years old, and let's assume her son is x years old currently. Therefore, the son's current age can be determined by subtracting 20 from Mrs Lim's current age:
Son's current age = Mrs Lim's current age - Age when Mrs Lim gave birth
Son's current age = m - 20
Now, to calculate the total age of Mrs Lim and her son in 12 years, we need to add 12 years to their current ages:
Total age in 12 years' time = Mrs Lim's current age + Son's current age + 12
Total age in 12 years' time = m + (m - 20) + 12
Simplifying the equation further:
Total age in 12 years' time = 2m - 8 + 12
Total age in 12 years' time = 2m + 4
So, the total age of Mrs Lim and her son in 12 years' time will be 2m + 4.