Algebra-1

To solve the system of equations by substitution, we can solve one equation for one variable and substitute it into the other equation. Let's solve the second equation for x:

From the second equation, we have:
x = 11 + 2y

Now, substitute this expression for x in the first equation:
-7(11 + 2y) - 2y = -13

Simplifying the equation:
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