80000-69×Х=73100 4"б

Question

80000-69×Х=73100 4"б

Answer 1

80000-73100=6900
6900-69*x=0
x=6900/69
х=100. 

Answer 2

8000-69*x=73100
69*x=80000-73100
69*x=6900
x=6900:69
x=100