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GCSE Maths Practice: simultaneous-equations

Question 1 of 12

\( \text{Solve the system of equations: } \\ \begin{cases} 6x - 2y = 18 \quad (1) \\ 3x + y = 9 \quad (2) \end{cases} \)

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Input Tips:

Use = for equality, ≠ for not equal.
Use pi or click π to insert π.
Use ^ for powers, e.g. x^2.
Use sqrt( ) or √ for square roots.
Fractions: type 1/2, not “½”.

\( \text{Elimination method: scale (2) to make the } y\text{-coefficients opposites, add the equations to find } x, \text{ then substitute to find } y. \)

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