Explanation

x + y = 67 ... (equation 1)

x - y = 3 ... (equation 2)

where x and y are the two numbers.

We can solve this system of equations by adding equation 1 and equation 2, which eliminates y:

2x = 70

Dividing both sides by 2 gives:

x = 35

Now that we have x, we can substitute it into equation 1 to find y:

35 + y = 67

Subtracting 35 from both sides gives:

y = 32

So, the two numbers are 35 and 32.

Explanation

To find the new price, you need to calculate 20% of the original price and subtract that amount from the original price.

Original price = $20

Discount = 20% of $20 = 0.20 x $20 = $4

New price = Original price - Discount

= $20 - $4

= $16

So, the correct answer is: $16.

Explanation

To find the total strength now, you need to calculate 12% of the original strength and add it to the original strength.

Original strength = 550

Increase = 12% of 550 = (12/100) × 550 = 66

New strength = Original strength + Increase = 550 + 66 = 616

So, the total strength now is 616.

Explanation

زکوٰۃ کا مقصد  دولت کو چند ہاتھوں میں جمع ہوجانے سے روکنا ہے۔ 

زکوٰۃ  اسلام کا ایک اہم ارکان ہے جو دو ہجری کو فرض ہوا تھا۔

Explanation

Vincent van Gogh (1853-1890) was a Dutch post-impressionist painter.

He is famous for his bold and expressive works, such as "Sunflowers", "The Starry Night", and "Self-Portrait with Bandaged Ear".

Explanation

وہ الفا ظ جن کے آخر میں ( ی)  یائے معروف اتی ہو مونث بولے جاتے ہیں 

جیسے تالی، توٹی، سبزی، کرسی، کشتی، کنجی، البتہ پانی، دہی ، گھی مذکر ہیں

Explanation

Galileo made his first telescope in 1609

The telescope is an optical instrument used to view distant objects/small object

Barometer Inventor: Evangelista Torricelli

Steam engine Inventor: Thomas Savery

Microscope Inventor : Zacharias Janssen

Explanation

Four years ago, the average age of A, B, and C was 25 years.

This means that the total age of A, B, and C four years ago was 25 x 3 = 75 years.

Since then, all three have aged 4 years, so their total age now is 75 + 4 + 4 + 4 = 87 years.

Five years ago, the average age of B and C was 20 years.

This means that the total age of B and C five years ago was 20 x 2 = 40 years.

Since then, both B and C have aged 5 years, so their total age now is 40 + 5 + 5 = 50 years.

Now, we know that the total age of A, B, and C is 87 years, and the total age of B and C is 50 years.

So, A's current age is 87 - 50 = 37 years.

The correct answer is: 37 years

Explanation

Free software and Open-source software are often used interchangeably, but they have slightly different meanings:

• Free software refers to software that is distributed free of cost, and the user has the freedom to use, modify, and distribute it.
• Open-source software refers to software whose source code is made available publicly, allowing users to view, modify, and distribute the software.

Explanation

To solve this proportion, we can use the following steps:

Write the proportion as a fraction: 3/x = 12/20

Cross-multiply: 3 × 20 = 12 × x

Simplify: 60 = 12x

Divide both sides by 12: x = 60/12

Simplify: x = 5

So, the value of x is 5.