PLEASE ANSWER ANY OF THESE ASAP

#1 x = 8
91 + 12x - 7 = 180
12x + 84 = 180
12x = 96
x = 8

#2 x = 100/7
68 + 7x + 12 = 180
80 + 7x = 180
7x = 100
x = 100/7

#3
top triangle:
22 + 49 + x = 180
71 + x = 180
x = 109

bottom triangle
109 + 44 + x = 180
153 + x = 180
missing value = 27

#4
left triangle
45+70+x=180
x=65

65+55+x=180
x=60

right triangle:
35+60+x=180
95+x=180

missing value= 85

wanna hit me with that brainliest? :’)

9n+3=7n+19, 9n-7n=19-3, 2n=16, n=8.
check it
72+3=75chairs

56+19=75chairs