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You've uploaded an image showing four systems of equations, labeled from 1 to 4. Let's solve each of them.

### System 1:
\[ \begin{align*}
5x - 3y & = 19 \\
2x - 6y & = 22 \\
\end{align*} \]

#### Step 1: Simplify the second equation by dividing by 2:
\[ \begin{align*}
5x - 3y & = 19 \\
x - 3y & = 11 \\
\end{align*} \]

#### Step 2: Solve for \( x \) by elimination:
Subtract the second equation from the first:
\[ \begin{align*}
(5x - 3y) - (x - 3y) & = 19 - 11 \\
4x & = 8 \\
x & = 2 \\
\end{align*} \]

#### Step 3: Substitute \( x = 2 \) into \( x - 3y = 11 \):
\[ \begin{align*}
2 - 3y & = 11 \\
-3y & = 9 \\
y & = -3 \\
\end{align*} \]

### System 2:
\[ \begin{align*}
0.2x + 0.7y & = 15 \\
0.2x + 0.2y & = 1 \\
\end{align*} \]

#### Step 1: Eliminate \( x \) by subtraction:
\[ \begin{align*}
(0.7y - 0.2y) & = 15 - 1 \\
0.5y & =

Solve the following systems of equations (four systems shown in the image).

This problem explores how to solve four different systems of linear equations using methods such as substitution and elimination. It covers key algebraic concepts and offers step-by-step solutions. Suitable for high school students in Grades 9-12.

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