Need help on last question

Step-by-step explanation:

so let the equation equal 13

13 = 3-12x+13

so when ever 3-12x=0  then this is equation is true, soooo

x (3 - 12) =0

so when x = 0  this is true, but also when

3-12=0   also

3 = 12

= 4

x = 2

so when x = 2  or -2  or 0  ,  then this is true

step-by-step explanation:

de-gf

hj=3x+20

ji=15x-64

faster, im not sure why but i know it is faster