Question

By substition method 2x+6=6 ,x-y=3

Answer 1

Step-by-step explanation:

See answer in above picture

Answer 2

Answer:

$2x + 6 = 6........1 \\ x - y = 3..........2 \\ from \: eq \:....2 \\ x - y = 3 \\ x = y + 3...........3 \\ put \: eq \: ....3 \: in \: eq \: .....1 \\ 2x + 6 = 6 \\ 2(y + 3) + 6 = 6 \\ 2y + 6 + 6 = 6 \\ 2y = 6 - 6 - 6 \\ 2y = - 6 \\ y = \frac{ - 6}{2} \\ y = - 3 \\ now \: y = - 3 \: put \: in \: eq \: .......3 \\ x = y + 3 \\ x = - 3 + 3 \\ x = 0 \\ so \: the \: answer \: is \\ (0 \: and \: - 3)$