$$3(y+4) \geq 4-(1-3y)$$
$y\in \mathrm{R}$
$$3y+12\geq 4-\left(1-3y\right)$$
$$3y+12\geq 4-1-\left(-3y\right)$$
$$3y+12\geq 4-1+3y$$
$$3y+12\geq 3+3y$$
$$3y+12-3y\geq 3$$
$$12\geq 3$$
$$y\in \mathrm{R}$$
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