Question

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Answer 1

Answer:

Macros

Explanation:

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Answer 2

Answer:

Let the income of first-person be Rs 9x and the income of the second person be Rs. 7x. Further, let the expenditures of the first and second person be 4y and 3y respectively. Then,

Saving of first-person =9x−4y

Saving of second person =7x−3y

∴9x−4y=200⇒9x−4y−200=0 (i)

and, 7x−3y−200⇒7x−3y−200=0 .(ii)

Solving equation (i) and (ii) by cross-multiplication, we have

(−4×−200)−(−3×−200)

x

=

(−200×−9)−(−200×−7)

−y

=

(9×−3)−(7×−4)

1

800−600

x

=

−1800+1400

−y

=

−27+28

1

⇒x=200 and y=400

Thus, monthly income of first person =Rs. 9x= Rs. (9×200)= Rs. 1800

and, monthly income of second person =Rs. 7x=Rs. (7×200)=Rs. 1400.

Explanation:

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