Question

2x-7y=11,6x-21=33 by substitution method​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

$6x - 21 = 33 \\ 6x = 33 + 21 \\ 6x = 54 \\ x = \frac{54}{6} \\ x = 9 \\ \\ \\ 2x - 7y = 11 \\ 2 \times 9 - 7y = 11 \\ 18 - 7y = 11 \\ - 7y = 11 - 18 \\ - 7y = - 7 \\ y = 1$

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