X +29=600-78. x-17=800-127,x·9=264-75, x:7=300-202

Question

X +29=600-78. x-17=800-127,x·9=264-75, x:7=300-202

Answer 1

1) x+29=522
    x=493
2) x-17=673
    x=690
3) x*9=189
    x=21
4) x:7=98
    x=686