[tex] 3x-\dfrac{4}{5}(15-10x)=-16\ \ \ \ |\text{use distributive property}\ a(b-c)=ab-ac\\\\3x-\dfrac{4}{5}\cdot15-\dfrac{4}{5}\cdot(-10x)=-16\\\\3x-4\cdot3+4\cdot2x=-16\\\\3x-12+8x=-16\\\\11x-12=-16\ \ \ \ |+12\\\\11x=-4\ \ \ \ |:11\\\\x=-\dfrac{4}{11} [/tex]
