Subtracting 7 from both sides isolates x, resulting in x = 5. This problem reinforces basic algebraic manipulation.

Under standard atmospheric pressure, water boils at 100°C. This fundamental scientific fact is essential for understanding temperature and phase changes.

A triangle's interior angles always add up to 180°. This is a basic geometric principle used in many mathematical problems.

Mars is known as the Red Planet due to its reddish appearance from iron oxide on its surface. This fact is a staple in introductory planetary science.

George Washington served as the first President of the United States and set many early precedents for the role. This question taps into fundamental U.S. history knowledge.

By adding 3 to both sides, the equation becomes 2x = 10, which simplifies to x = 5 after dividing by 2. This reinforces the method of solving basic linear equations.

Distributing the 3 yields 3x + 6, and subtracting 2x results in x + 6. This problem tests the understanding of the distributive property and combining like terms.

A simile directly compares two distinct things using 'like' or 'as'. Recognizing similes is key to understanding figurative language in literary texts.

Mitochondria generate ATP, which is crucial for powering cellular activities. This question is central to understanding cellular biology and energy production.

The Declaration of Independence was adopted in 1776 to announce the American colonies' separation from Britain. Understanding this historical document is critical for grasping American history.

Plants absorb carbon dioxide during photosynthesis and convert it into oxygen and glucose. This process is fundamental to plant biology and the carbon cycle.

The area of a circle is found by multiplying π by the square of the radius. This fundamental formula is a cornerstone of geometry.

To elevate means to lift or raise something up. This question assesses vocabulary and the ability to match synonyms accurately.

Multiplying the speed (60 mph) by the time (2.5 hours) gives 150 miles. This question applies basic arithmetic to solve a distance-rate problem.

The chemical symbol 'Na' stands for sodium, derived from its Latin name 'natrium'. Recognizing periodic table symbols is essential in chemistry.

First, calculate the exponents: 2^3 is 8 and 2^2 is 4. Then, perform the multiplications and subtraction in order to arrive at the correct answer of 29.

A dynamic character experiences substantial growth or change over the course of a narrative. This concept is key in understanding character development in literature.

Combine the fractions by finding a common denominator to get (5x/6) = 5. Solving for x by multiplying both sides by 6 and then dividing by 5 yields x = 6.

The landmark case Marbury v. Madison established that the Supreme Court has the power to review and nullify unconstitutional laws. This case is fundamental in understanding the balance of power within the U.S. government.

Exponential functions, such as f(x) = 2^x, increase at a rate proportional to their current value. This contrasts with polynomial or logarithmic functions, and the question tests an understanding of function types and their growth behaviors.