Question

by substitution method 2y - x = 9 ; 6y - 3x = 21 ​

Answer 1

$2y - x = 9 - - - - - - 1 \\ \\ 6y - 3x = 21 - - - - - - 2 \\ \\ from - 1 \: \: \: y = \frac{9 + x}{2} \\ \\ substitute \: in \: equation - 2 \\ \\ 6( \frac{9 + x}{2} ) - 3x = 21$

Answer 2

Answer:

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