Recall Activity Linear Equations In 1 Variable (Gr-8)

Explanation
A linear equation is an equation where the highest power of the variable is one. This means that the variable is not raised to any exponent higher than one. In other words, the equation does not involve any squared terms, cubed terms, or any other higher powers of the variable. Therefore, the statement is true.

Explanation
By moving -x to the left-hand side of the equation, it becomes 3x = 4. This is a valid step in solving the equation. Therefore, the statement "3x = 4" is true.

Explanation
The given equation is 3x - 3 = 9. To isolate the variable x, we need to move the constant term -3 to the right-hand side of the equation. By doing so, we should have 3x = 12. Therefore, the correct answer is False.

Explanation
This statement is false because two different equations can indeed have the same answer. For example, the equations 2 + 2 = 4 and 3 + 1 = 4 both have the same answer of 4. Therefore, it is possible for different equations to yield the same result.

Explanation
The statement given in the question is incorrect. It states that the boy's age 2 years ago was (y - 2) years, but this is not necessarily true. The boy's age 2 years ago would be (y - 2) only if his age remained the same for the past 3 years. However, the question does not provide any information about the boy's age in the present or in the past, so we cannot assume that his age has remained constant. Therefore, the correct answer is False.