Explanation

30% of x = 21 → (30/100) × x = 21 → x = 21 × (100/30) = 70

Now find what percent 49 is of 70: (49 / 70) × 100 = 70%

Explanation

Combine terms: (2x/24) + (x/24) = 0 → (3x/24) = 0

Multiply both sides by 24: 3x = 0 → x = 0

Explanation

"Its" is the possessive form meaning belonging to the dog.

Example: The dog bites its paws.

Explanation

"Delighted" is the past participle used as an adjective to show Ali’s strong feeling of happiness.

Delighted means خوش

Explanation

"Great" describes the noun "height", so it functions as an adjective.

It qualifies how high the wall is.

Explanation

Agencies use secure wireless systems to avoid tracking or interception.

It helps protect the location and identity of agents during communication.

Explanation

Watch towers are elevated structures used to observe wide areas over long distances.

Ideal for surveillance, border security, and early threat detection.

Explanation

"Poor" is used as a plural noun here to refer to poor people collectively.

Poor means غریب

Explanation

The pattern decreases by 5, then 5 again:

18 → 13 (minus 5)

13 → 8 (minus 5)

8 → 3 (minus 5)

Explanation

The phrase "Don't break the flow" refers to maintaining momentum or concentration during a task or activity.

It’s commonly used when someone is working smoothly, and an interruption would disturb their progress.