Question

11. Solve the following pairs or equaliung WY
1. 0.3x + 0.4y = 2.5 and 0.5x - 0.3y = 0.3
2. 5x + 8y = 18, 2x - 3y = 1
12. The sum of the digits of two digit number is 3. The number obtained by interchanging the digits is 9
less than the original number. Find the original number.
thrice the cost of a chair. The total cost of 4 chairs and a table is Rs. 2100. Find
of 아
obta​

Answer 1

Answer:

(1)9.4

(2)12

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