555 + x + 595 = 40 000 ; x÷2=39000÷3; 6900÷a=92÷4;

Question

555 + x + 595 = 40 000 ; x÷2=39000÷3; 6900÷a=92÷4;

Answer 1

555+х+595=40000
х=40000-555-595
х=38850

х:2=39000:3
х:2=13000
х=13000*2
х=26000

6900:а=92:4
6900:а=23:1
23*а=6900
а=6900:23
а=300