Răspuns :
2a + 3b = 117
a = 3b
2 · 3b + 3b = 117
6b + 3b = 117
9b = 117 ; b = 117 : 9 = 13
a = 3b = 3· 13 = 39
a = 3b
2 · 3b + 3b = 117
6b + 3b = 117
9b = 117 ; b = 117 : 9 = 13
a = 3b = 3· 13 = 39
2a+3b=117
a=3b
inlocuim in prima relatie
6b+3b=117
9b=117
117:9=13(b)
13x3=39(a)
a=3b
inlocuim in prima relatie
6b+3b=117
9b=117
117:9=13(b)
13x3=39(a)