In Exercises 118, solve each system by the substitution method. [2x + y = -5 y =
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In Exercises 1–18, solve each system by the substitution method.
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[2x + y = -5 y = x² + 6x + 7
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2xy 5 yx 6x7 Substitute the expression x 6x7 f...View the full answer
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