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The image contains the following text in Indonesian:

"Jika 12x - 8 = -20xy, maka 5xy - 2 = ..."

This translates to:

"If \(12x - 8 = -20xy\), then \(5xy - 2 =\) ..."

To solve this, we need to express \(5xy - 2\) in terms of known variables, using the information from the first equation \(12x - 8 = -20xy\).

### Step 1: Solve for \(xy\)
From \(12x - 8 = -20xy\), we can isolate \(xy\):

\[
12x - 8 = -20xy
\]

Add \(20xy\) to both sides:

\[
12x - 8 + 20xy = 0
\]

Factor the equation:

\[
x(12 + 20y) = 8
\]

Solve for \(xy\):

\[
xy = \frac{8}{12 + 20y}
\]

### Step 2: Substitute into \(5xy - 2\)
Now substitute \(xy = \frac{8}{12 + 20y}\) into the second expression \(5xy - 2\):

\[
5xy - 2 = 5\left(\frac{8}{12 + 20y}\right) - 2
\]

Simplify:

\[
5xy - 2 = \frac{40}{12 + 20y} - 2
\]

This is the simplified form of the expression.

Would you like more details or have any questions about this solution?

### Related questions:
1. How do we solve systems of equations involving multiple variables?
2. What are the common techniques to simplify algebraic fractions?
3. How can we isolate variables in equations with multiple terms?
4. What strategies can be used to check the validity of a solution in algebra?
5. What other types of problems can we solve using the concept of substitution?

### Tip:
When solving equations with multiple variables, it's often helpful to isolate one variable first and substitute it into the other equation to simplify the process.

Explore how to solve the algebraic equation 12x - 8 = -20xy using substitution and simplification methods. The solution walks through each step, from rearranging the equation to substituting variables, providing a clear understanding for students in Grades 8-10.

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