\(\left(\frac{\sqrt{\left(-4\right).\left(-9\right)}}{\sqrt{2}}-\sqrt{2}.x\right):5,6=-7,2\)
\(\left(\frac{\sqrt{36}}{\sqrt{2}}-\sqrt{2}.x\right):\frac{28}{5}=\frac{-36}{5}\)
\(\frac{6}{\sqrt{2}}-\sqrt{2}.x=\frac{-36}{5}.\frac{28}{5}\)
\(\frac{6}{\sqrt{2}}-\sqrt{2}.x=\frac{-1008}{25}\)
\(\sqrt{2}.x=\frac{6}{\sqrt{2}}-\frac{-1008}{25}\)
\(\sqrt{2}.x=\frac{6}{\sqrt{2}}+\frac{1008}{25}\)
\(\sqrt{2}.x=\frac{150+\sqrt{2}.1008}{\sqrt{2}.25}\)
\(x=\frac{150+\sqrt{2}.1008}{\sqrt{2}.25}.\frac{1}{\sqrt{2}}\)
\(x=\frac{150+\sqrt{2}.1008}{25.2}=\frac{75+\sqrt{2}.504}{25}\)
Vậy \(x=\frac{75+\sqrt{2}.504}{25}\)
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