$$\frac { x } { 2 } + \frac { 5 x } { 2 } + \frac { 3 x } { 2 } = 25$$
$x = \frac{50}{9} = 5\frac{5}{9} \approx 5.555555556$
$$x+5x+3x=50$$
$$6x+3x=50$$
$$9x=50$$
$$x=\frac{50}{9}$$
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