Simplifying and Combining Like Terms: One sided equations

$7x+4x+5x=0$

$x=\text{?}$

Let's combine all the x terms together:

$7x+4x+5x=11x+5x=16x$

The resulting equation is:

$16x=0$

Now let's divide both sides by 16:

$\frac{16x}{16}=\frac{0}{16}$

$x=\frac{0}{16}=0$

$0$

$7m+3m-40m=0$

$m=\text{?}$

0

$2a+3a+45a=0$

$a=\text{?}$

$0$

$x+8+3x-4=0$

$x=\text{?}$

1-

$a+7+3a-15=0$

$a=\text{?}$

2

$b+2b+4=0$

$b=\text{?}$

$-1\frac{1}{3}$

$5+3+x+2x+1=0$

$x=\text{?}$

3-

$70x+30x+10+1+10x=0$

$x=\text{?}$

$-\frac{1}{10}$