human
Recognise whether you need to add or subtract linear equations in order to eliminate a variable What do you need to do to eliminate the \( q s \) in each of these pairs of simultaneous equations? Pair \( 1 \)
\(
\begin{array}{l}
-5 p+2 q=12 \\
3 p-2 q=8
\end{array}
\) Pair \( 2 \)
\(
\begin{array}{l}
-5 p-2 q=12 \\
3 p+2 q=8
\end{array}
\) Subtract Pair \( 1 \)
Subtract Pair \( 2 \)
gpt
Believes that when eliminating a variable, if the signs of the terms with matching coefficients are different, we subtract the equations.