Answer:
Distributive Property
Step-by-step explanation:
They distributed the -3 to x and 4. In this case, to distribute the -3, you multiply it to each term.
-3 × x = -3x.
-3 × 4 = -12.
-3x - 12
<h2>SOLVING</h2>

What is the slope of the line passing through the point (1,2) and (5,4)

Formula used, here 
_______________________________________________________
| simplify
| reduce






making x the subject

substitute into second equation

by solving, y=5
substitute into first equation

by solving, x=-3
Therefore the ordered pair is (-3,5)
4b+4<20-12b
16b<16
b<1 olur.
<u><em>İYİ DERSLER!</em></u>