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Activity Discussion Math Linear Equation in one variable

• # Linear Equation in one variable

Posted by on June 23, 2023 at 5:41 pm

Rohit is twice as old as his brother. The sum of their ages is 24 years. How old is each of them?

replied 3 months, 1 week ago 2 Members · 3 Replies
• 3 Replies

Member
June 23, 2023 at 5:50 pm
1

Let age of Rohit’s brother be x years.

So according to the question , Rohit’s age = twice his brother = 2x years

Sum of their ages = 24 years

=> x + 2x = 24

=> 3x = 24

=> x = 24/3 ( here we transpose the 3 being multiplied on left hand side to divide on right hand side)

=> x = 8 years

=> 2x = 8 x 2 = 16 years

So Rohit’s brother’s age is 8 years and Rohit’s age is 16 years👍

• ### Aftab

Member
June 23, 2023 at 5:44 pm
0

Given that \$1 is equal to Rs. 80, we can use this information to determine the cost of 3 eggs in rupees when a dozen eggs cost \$2.

First, let’s calculate the cost of 1 egg in dollars. Since a dozen eggs cost \$2, we divide \$2 by 12 to find the cost of 1 egg:

Cost of 1 egg in dollars = \$2 / 12 = \$1/6

Next, we can convert the cost of 1 egg from dollars to rupees using the given conversion rate of \$1 = Rs. 80:

Cost of 1 egg in rupees = Cost of 1 egg in dollars × Conversion rate = \$1/6 × Rs. 80 = Rs. (80/6) = Rs. 40/3

Now, to find the cost of 3 eggs in rupees, we multiply the cost of 1 egg in rupees by 3:

Cost of 3 eggs in rupees = 3 × (Rs. 40/3) = Rs. (40/1) = Rs. 40

Therefore, 3 eggs would cost Rs. 40.

In summary, we used the given conversion rate of \$1 = Rs. 80 to determine the cost of 1 egg in rupees. We then multiplied the cost of 1 egg by 3 to find the cost of 3 eggs, which turned out to be Rs. 40.

• ### Aftab

Member
June 23, 2023 at 7:16 pm