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The absolute worst way to write a simultaneous equations question:

\({\color{yellow}x} + {\color{blue}x} = {\color{green}x}\)
\({\color{green}x} + {\color{blue}x} = 4{\color{yellow}x}\)
\({\color{yellow}x} + {\color{green}x} = 3{\color{blue}x}+1\)
Find \(\color{yellow}x\), \(\color{blue}x\), and \(\color{green}x\).

@mscroggs or if we're rendering in black & white, mix in \(\mathcal{X},\mathbb{X},X,\mathsf{X},\mathrm{X},\) etc.

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