https://file.aiquickdraw.com/mathbot/file/1726072923353zgc02kfg.jpg

The given equation is:

\[
2y = 4(a - 1)
\]

This is already a simple linear equation, and it does not actually contain any fractions, so no cross-multiplication is required. However, we can solve for \( y \) if needed. 

### Solving for \( y \):
To isolate \( y \), divide both sides of the equation by 2:

\[
y = \frac{4(a - 1)}{2}
\]

Simplifying:

\[
y = 2(a - 1)
\]

or

\[
y = 2a - 2
\]

Thus, the equation in simplified form is:

\[
y = 2a - 2
\]

Would you like more details, or do you have any questions?

Here are 5 related questions to expand on this:

1. How do you cross-multiply when actual fractions are involved in an equation?
2. Can this equation be graphed? If so, what would its graph look like?
3. How would you solve this equation for \( a \) instead of \( y \)?
4. What types of equations require cross-multiplication?
5. How can you verify the solution for \( y \) using substitution?

**Tip:** Always simplify the equation as much as possible after cross-multiplying or solving, to make sure no further steps are needed!

Cross-multiply to eliminate the fractions: 2y = 4(a - 1)

Learn how to solve the linear equation 2y = 4(a - 1) by cross-multiplying to eliminate fractions and simplifying the result. Perfect for students in Grades 7-9, this explanation breaks down each step clearly.

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