Mathematics ACT Aspire Test 2025 – 400 Free Practice Questions to Pass the Exam

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Question: 1 / 400

If 5(x - 1) = 15, what is the value of x?

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To solve the equation \( 5(x - 1) = 15 \), begin by isolating the term that contains \( x \). Start by dividing both sides of the equation by 5:

\[

x - 1 = \frac{15}{5}

\]

This simplifies to:

\[

x - 1 = 3

\]

Next, add 1 to both sides of the equation to solve for \( x \):

\[

x = 3 + 1

\]

This results in:

\[

x = 4

\]

Thus, the value of \( x \) is 4. This illustrates that when the equation is correctly manipulated step by step, it leads directly to finding the value of \( x \). The correct answer demonstrates an understanding of basic algebraic principles, specifically how to isolate a variable in an equation.

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