Mathematics: The sum of the present age of a mother and her son is 35 and the difference is 25 years.find their present age.(By substitution or elimination method).

I think the perimeter is 24 Step-by-step explanation:...

The sum of the present age of a mother and her

Jreye77

14.02.2022

Son = 5 years old

Mum = 30 years old

Step-by-step explanation:

Let the Mum be M and the Son be S;

M + S = 35 --- Sum

M - S = 25 -- Difference

Required

Find M and S (their ages)

Using elimination method; Add both equations to eliminate S

M + S = 35

M - S = 25

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M + M + S - S = 35 + 25

2M = 60

Solve for M

$M = \frac{1}{2} * 60$

M = 30

Substitute 30 for M in M + S = 35

30 + S= 35

Solve for M

S = 35 - 30

S = 5

Hence:

Son = 5 years old

Mum = 30 years old

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