Question

Solve by substitution method--

(1) 3x-y=3
9x-3y=9
find step by step.​

Answer 1

Answer:-

$3x - y = 3 - - - - 1 \\ 9x - 3y = 9 - - - - 2 \\ \\ from \: - 1 \\ 3x = 3 + y \\ x = \frac{3 + y}{3} \\ \\ substitute \: in \: eq - 2 \\ \\ 9x - 3y = 9 \\ 9( \frac{3 + y}{3} ) - 3y = 9 \\ 27 + 9y - 9y = 27 \\ y = 0 \\ and \: x = 1$

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