Răspuns :
problema 1:a=b+35
(a+b):(a-b)=46(rest 25)
(2b+35): 35 =46(rest 25)
2b+35=35*46 +25
2b+35=1635
2b=1600
b=800
a=600+ 35
a+635
problema2:a=b+27
(a+b):(a-b)=46(rest 25)
(2b+27): 27 =46(rest 25)
2b+27=27*46 +25
2b+27=1267
2b=1240
b=620
a=620+27
a=647
problema 3:
a+b+c=486
b:a=3(rest 18)
c:b=2(rest 12)
b=3a+18
c=2b+12
c=6a+36+12
c=6a+48
a+3a+18+6a+48=486
10a+66=486
10a=420
a=42
b=42*3+18
b=144
c=6*42+48
c=300
problema 4:
a+b+c=2050
b-a=75=> b=a+75
c:b=5(rest 25)
c=5b+25
c=5a+400
a+a+75+5a+400=2050
7a=2050-475
7a=1575
a=225
b=300
c=300*5+25
c=1525
(a+b):(a-b)=46(rest 25)
(2b+35): 35 =46(rest 25)
2b+35=35*46 +25
2b+35=1635
2b=1600
b=800
a=600+ 35
a+635
problema2:a=b+27
(a+b):(a-b)=46(rest 25)
(2b+27): 27 =46(rest 25)
2b+27=27*46 +25
2b+27=1267
2b=1240
b=620
a=620+27
a=647
problema 3:
a+b+c=486
b:a=3(rest 18)
c:b=2(rest 12)
b=3a+18
c=2b+12
c=6a+36+12
c=6a+48
a+3a+18+6a+48=486
10a+66=486
10a=420
a=42
b=42*3+18
b=144
c=6*42+48
c=300
problema 4:
a+b+c=2050
b-a=75=> b=a+75
c:b=5(rest 25)
c=5b+25
c=5a+400
a+a+75+5a+400=2050
7a=2050-475
7a=1575
a=225
b=300
c=300*5+25
c=1525
1)a-35=b
(a+b):(a-b)=46 rest 25
(a+b)=46(a-b)+25
a+a-35= 46(a-a+35)+25
2a-35=46*35+25
2a=1610+25+35
2a=1610+60
2a=1670
a=835
b=835-35=800
2)a-27=b
(a+b):(a-b)=46 rest 25
(a+a-27)=46(a-b)+25
2a-27=46(a-a+27)+25
2a-27=46*27+25
2a=1242+25 +27
2a=1242+52
2a=1294
a=647
b=647-27=620
3)a+b+c=486
b:a=3 rest 18
b=3a+18
c:b=2 rest 12
c=2b+12= 2(3a+18)+12= 6a+36+12= 6a+48
a+3a+18+6a+48=486
10a+66=486
10a=486-66
10a=420
a=42
b=3*42+18= 126+18=144
c=6*42+48= 252+48=300
4)a+b+c=2050
b-a=75
b=a+75
c:b=5 rest 25
c=5b+25= 5(a+75) +25= 5a +375 +25=5a +400
a+a+75+5a+400=2050
7a+475=2050
7a=2050-475
7a=1575
a=225
b=225+75=300
c=5*225 +400= 1125+400=1525
(a+b):(a-b)=46 rest 25
(a+b)=46(a-b)+25
a+a-35= 46(a-a+35)+25
2a-35=46*35+25
2a=1610+25+35
2a=1610+60
2a=1670
a=835
b=835-35=800
2)a-27=b
(a+b):(a-b)=46 rest 25
(a+a-27)=46(a-b)+25
2a-27=46(a-a+27)+25
2a-27=46*27+25
2a=1242+25 +27
2a=1242+52
2a=1294
a=647
b=647-27=620
3)a+b+c=486
b:a=3 rest 18
b=3a+18
c:b=2 rest 12
c=2b+12= 2(3a+18)+12= 6a+36+12= 6a+48
a+3a+18+6a+48=486
10a+66=486
10a=486-66
10a=420
a=42
b=3*42+18= 126+18=144
c=6*42+48= 252+48=300
4)a+b+c=2050
b-a=75
b=a+75
c:b=5 rest 25
c=5b+25= 5(a+75) +25= 5a +375 +25=5a +400
a+a+75+5a+400=2050
7a+475=2050
7a=2050-475
7a=1575
a=225
b=225+75=300
c=5*225 +400= 1125+400=1525