Question

read the instructions first​

Answer 1

Step-by-step explanation:

a)The age of my father is 3 years more than that of my age .3 years hence the age of my father will be 10 years more than twice the age of my age.

Find the age of mine and my father

b)The total expenditure per month of our house hold consists of a fixed rent of the house and the mess charges depending upon the number of people sharing in my house The total monthly expenditure is Php.3900.00 for 2 people and Php.7500 for 5 people.

Find the rent and the mess charges per month

Answer 2

❥︎Bank Situation

❥︎Real Life Situation is :-

• Meena went to a bank to withdraw Rs 2000. She asked the cashier to give her Rs 50 and Rs 100  notes only. Meena got 25 notes in all. Find how many notes Rs 50 and Rs 100 she received.

❥︎Solution is :-

Let the Rs. 50 notes by 'x' and Rs. 100 notes be 'y'.

❥︎Case :- 1.

Meena got 25 notes in all.

$\bf\implies \:x + y = 25 \: ⟶ \: (1)$

❥︎Case :- 2

Total amount withdrawal is Rs 2000 in the form of Rs 50 and Rs 100 notes only.

$\bf\implies \:50x + 100y = 2000⟶(2)$

❥︎Divide by 50 both sides, we get

$\bf\implies \:x + 2y = 40 \: ⟶ \: (2)$

❥︎On substracting (1) from (2), we get

$\bf\implies \:x + 2y - x - y = 40 - 25$

$\bf\implies \:y = 15 \: ⟶ \: (3)$

❥︎Put (3) in (1), we get

$\bf\implies \:x + 15 = 25$

$\bf\implies \:x = 10 \: ⟶ \: (4)$

$\bf\implies \:Rs. \: 50  \: notes \: = \: 10 notes.$

$\bf\implies \:Rs. \: 100  \: notes \: = \: 15 notes.$

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