Mathematics

# Please can anyone help with this one? I 3y - 4 I = I 3y + 8 I

$|3y - 4 |= | 3y + 8 |\\ 3y-4=3y+8 \vee 3y-4=-3y-8\\ -4=8 \vee 6y=-4\\ y=-\frac{4}{6}\\ y=-\frac{2}{3}$