Answer:
[tex]-10x-28[/tex]
Step-by-step explanation:
[tex]-3x-7(x+4)[/tex]
Expand by using distributive law: [tex]a(b+c)=ab+ac[/tex]
Therefore,
[tex]-3x-7*x+\left(-7\right)\cdot \:4[/tex]
[tex]-3x-7x-7\cdot \:4[/tex]
[tex]-3x-7x-28[/tex]
Add the x:
[tex]-10x-28[/tex]
