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The question on the image is asking for the value of \( 2x + 7y \) given the system of equations:

\[
5x + 3y = 21
\]
\[
2x - 4y = -2
\]

Let's solve this system of equations and find the value of \( 2x + 7y \). I'll walk you through the steps.

### Step 1: Solve the system of equations

We can use either substitution or elimination to solve for \( x \) and \( y \). Let's go with elimination for clarity:

**Equation 1**: \( 5x + 

Jika 5x + 3y = 21 dan 2x - 4y = -2, maka nilai 2x + 7y adalah ...

Learn how to solve the system of linear equations 5x + 3y = 21 and 2x - 4y = -2, and find the value of 2x + 7y. This problem covers key algebraic concepts including elimination and substitution methods. Suitable for students in Grades 9-10.

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