rezolvați repede vă rog

Răspuns:
(a+25)×100=470
a+25=470:100
a+25=47
a=47-25
a=22
(b:10):9=17 rest 6 =》17+6=23
(b:10):9=23
b:10=23×9
b:10=207
b=207×10
b=2070
100:(c:7+175:5)=6300
100:(c:7+35)=6300
100:(c:7)=6300-35
100:(c:7)=6265
c:7=6265×100
c:7=626,500
c=626,500×7
c=4,385,500
(240:10×37):d=7 rest 6 =》7+6=13
(240:10×37):d=13
(24×37):d=13
888:d=13
d=888:13
d=68 rest 2
Sper ca te am ajutat!