Răspuns :
a + b + c + r = 535
c = 4
r = 38
a : b = 4 rest 38
a = 4b + 38
4b + 38 + b + 4 + 38 = 535
5b = 535 - 80
b = 455 : 5
b = 91
a = 4 * 91 + 38
a = 402
verificare:
402 + 91 + 4 + 38 = 535
c = 4
r = 38
a : b = 4 rest 38
a = 4b + 38
4b + 38 + b + 4 + 38 = 535
5b = 535 - 80
b = 455 : 5
b = 91
a = 4 * 91 + 38
a = 402
verificare:
402 + 91 + 4 + 38 = 535
a:b=4+38
a+b+4+38=535
a+b=535-4-38
a+b= 493
a=4*b+38
a+b=493
5b+38= 493
5b=493-38
5b=455
b=91
a=4*b+38
a=4*91+38
a=364+38
a=402
a+b+4+38=535
a+b=535-4-38
a+b= 493
a=4*b+38
a+b=493
5b+38= 493
5b=493-38
5b=455
b=91
a=4*b+38
a=4*91+38
a=364+38
a=402