Answer:
[tex]=\frac{12x}{5}[/tex]
Step-by-step explanation:
STEPS
[tex]3x\frac{4}{5}[/tex]
[tex]\mathrm{Multiply\:fractions}:\quad \:a\cdot \frac{b}{c}=\frac{a\:\cdot \:b}{c}[/tex]
[tex]=\frac{4\cdot \:3x}{5}[/tex]
[tex]\mathrm{Multiply\:the\:numbers:}\:4\cdot \:3=12[/tex]
[tex]=\frac{12x}{5}[/tex]