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I need help on these questions PRACTICE SOLVING LINEAR SYSTEMS BY SUBSTITUTION 1. Solve each linear system using the method of substitution. Check your answers.

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PRACTICE SOLVING LINEAR SYSTEMS BY SUBSTITUTION 1. Solve each linear system using the method of substitution. Check your answers. a) y = 2x - 3 b) x = -4y - 6 xty=6 2x + by = 5 2. Is (2, -3) the solution for the following linear system? Explain how you can tell. 3x + by = -12 2y - 8x = -22

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