3,18x+1,02x=12,81 30 баловв!!!

Question

3,18x+1,02x=12,81 30 баловв!!!

Answer 1

3,18х+1,02х=12,81
4,2х=12,81
х=12,81:4,2
х=3,05
проверка
3,18*3,05+1,02*3,05=12,81
9,699+3,111=12,81
12,81=12,81

Answer 2

3,18x+1,02x=12,81
4.20х=12.81
х=3.05