(x-12):11+89=100 срочно

Question

(x-12):11+89=100 срочно

Answer 1

(x-12):11+89=100
(x-12):11=11
x-12=1
x=1+12
x=13

Answer 2

(x-12):11+89=100
(x-12):11=100-89
(x-12):11=11
x-12=1
x=12+1
x=13