In Exercises 312, solve the system by substitution.2x - 3y = -23 x + y = 0
Chapter 7, Problem 7.1.1.16(choose chapter or problem)
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In Exercises 3–12, solve the system by substitution.
\(\begin{aligned} 2 x-3 y & =-23 \\ x+y & =0 \end{aligned}\)
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