Solve simultaneous equations by substitution.
\( \begin{array}{l}\text{Solve: } 3 \times x + 2 \times y = 18, x + y = 6\end{array} \)
Choose one option:
Substitute carefully and simplify step by step. Check both equations.
Use \(y = 6-x\) and substitute into \(3 \times x + 2 \times y = 18\) to solve. Then find \(y\).
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