solve : $0.7 x + 0.3 x = 0.5 x + 6$

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Solution

The given equation is $0.7 x + 0.3 x = 0.5 x + 6$
$1.0 x = 0.5 x + 6$
$1.0 x - 0.5 x = 6$
$0.5 x = 6$
$\Rightarrow x = \frac{6}{0.5}$
$\Rightarrow x = 12$

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