$$2 ( y - \frac { 5 } { 2 } ) = 0.3 y = . ?$$
$y = \frac{50}{17} = 2\frac{16}{17} \approx 2.941176471$
$$2y+2\left(-\frac{5}{2}\right)=0.3y$$
$$2y-5=0.3y$$
$$2y-5-0.3y=0$$
$$1.7y-5=0$$
$$1.7y=5$$
$$y=\frac{5}{1.7}$$
$$y=\frac{50}{17}$$
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