$$\frac{y-2}{3}-\frac{y+5}{7}=(-2)$$
$y = -\frac{13}{4} = -3\frac{1}{4} = -3.25$
$$7\left(y-2\right)-3\left(y+5\right)=-42$$
$$7y-14-3\left(y+5\right)=-42$$
$$7y-14-3y-15=-42$$
$$4y-14-15=-42$$
$$4y-29=-42$$
$$4y=-42+29$$
$$4y=-13$$
$$y=\frac{-13}{4}$$
$$y=-\frac{13}{4}$$
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