Question

a-b=509 a÷b=57rest5 a=?b=?

Answer 1

a- b =509

a: b= 57 rest 5 ....a= b*57 +5

b : _______/

a: _______/__________/________/ ... ________/__5     .............suma lor 509

                                   57 de segmente

daca scadem din a pe b ne raman 56 de segmente

ca sa avem 56 de segmente egale....scadem ce avem in plus...adica 5

509 - 5 = 504

504: 56 = 9 (un segment)

deci:

b=9

a= b * 57 +5

a = 9 * 57 +5

a = 513 +5

a = 518

Answer 2

a-b=509

a:b=57 rest 5   => a=57b+5

57b+5-b=509

56b+5=509

56b=509-5

56b=504

b=504:56

b=9

a-9=509

a=509+9

a=518