GED Math Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What is the solution for z in the equation 5z - 15 = 10?

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To find the solution for \( z \) in the equation \( 5z - 15 = 10 \), start by isolating \( z \).

First, add 15 to both sides of the equation to eliminate the constant term on the left side:

\[

5z - 15 + 15 = 10 + 15

\]

This simplifies to:

\[

5z = 25

\]

Next, to solve for \( z \), divide both sides of the equation by 5:

\[

z = \frac{25}{5}

\]

This simplifies to:

\[

z = 5

\]

Therefore, the solution for \( z \) is 5.

This process involves standard algebraic steps for solving linear equations and demonstrates the importance of maintaining equality while manipulating both sides of the equation to find the variable's value.

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