human
Recognise whether you need to add or subtract linear equations in order to eliminate a variable Tom and Katie are discussing simultaneous equations Tom says you need to add these equations to eliminate \( y \)
\(\begin{array}{r}
4 x-3 y=12 \\
x+3 y=15
\end{array}\) Katie says you need to add these equations to eliminate \( y \)
\(\begin{array}{r}
4 x+3 y=12 \\
x-3 y=15
\end{array}\) Who is correct? Neither is correct
gpt
Does not think that -n + n = 0