human
Recognise if two linear expressions are in an appropriate form to be added or subtracted Tom and Katie are discussing whether simultaneous equations are in an appropriate form to be added or subtracted, or whether they need transforming first. Tom says these equations are in an appropriate form
\(
\begin{array}{l}
2 x-3 y=10 \\
5 x+3 y=18
\end{array}
\) Katie says these equations are in an appropriate form
\(
\begin{array}{l}
2 x-3 y=10 \\
2 x+y=4
\end{array}
\) Who is correct? Only Katie
gpt
When solving simultaneous equations, believes the terms must have the same sign in order to be eliminated.