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From the first equation, y = 10 - 2x. Substitute y = 10 - 2x into the second equation: 3x - 2(10 - 2x) = 5. 3x - 20 + 4x = 5. 7x = 25. x = 25/7. Substitute x = 25/7 into y = 10 - 2x: y = 10 - 2(25/7). y = 10 - 50/7. y = 70/7 - 50/7. y = 20/7. x + y = 25/7 + 20/7 = 45/7. Correct option: a
Two numbers are in the ratio 7:5. After adding 2 and 4 to them respectively the ratio becomes 2:3. Find the bigger number.
A box contains the coins of 5p, 10p and 25p are in the ratio 3:4:6. If there is Rs. 82 in all, how many 10p coins are there?
A sum of Rs.1000 is divided among P, Q and R such that P gets Rs.150 more than Q. Q gets Rs.110 more than R. How much does R receive?
A sum of money is divided in the ratio of 5:9. If the smaller part is 405. Find the larger part.
If the mean proportion of 4.8 and 1.2 is denoted by 'k', then determine the value of '5k'.
What is the fourth proportion of 16, 20 and 24?
The earnings of two individuals, P and Q, are in the ratio of 4:7. After an increase of 30% in Q’s earnings, his total earnings amount to Rs. 27,300. ...
The ratio of two numbers is 6:7. If each number is decreased by 3, the ratio becomes 9:11. Find the smaller numbers.
The ratio between the number of males and females in a college is 25: 26. If the number of males increases by 20% and the number of females increases by...
