Answer:

Step-by-step explanation:

#1.

-36 + 3x = -24-18

3x = -24-18+36

x = -6/3

x = -2

#2.

-45x13 = 77+90 --> something is wrong with the equation!

is it -45x + 13 = 77+90 or -45x - 13 = 77 + 90

if it's -45x - 13 = 77 + 90

-45x = 77+90+13

x = -180/45

x = -4