Question

Are your solutions the same? Explain why this happens?

Answer 1

$y = - x + 3 \\ 3x- 6y = 8 \\ sub \: y \: into \: next \: formula \\ 3x - 6( - x + 3) = 8 \: \: \: collect \: like \: terms \\ 3x + 6x - 18 = 8 \\ 9x = 26 \\x = \frac{26}{9} \\ sub \: x \: into \: first \: eqaution \\ y = - ( \frac{26}{9} ) + 3 \\ y = - \frac{ 26}{9} + \frac{27}{9} \\ y = 1 \\ so \: the \: answer \: is \: \\ x = \frac{26}{9} \: \: \: \: y = 1$
draw the graphs and find the interaction that way too. but i find simultaneous equations easy