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⇒a=3b+4;
⇒3b+4+b=32
⇒4b=28
⇒b=7;
⇒a=3·7+4
⇒a=21+4
⇒a=25;
a + b =32
a : b = 3 (r 4) => a = 3b + 4
inlocuiesti in ecuatia initiala (pe a cu "3b +4") :
3b+4+b=32
4b +4 =32
4b = 32-4 => 4b = 28 => b = 28 :4
b = 7
a = 3b +4 => a = 3 × 7 +4 => a = 25