Question

Dau 200 de puncte dacă o rezolvi

Answer 1

Răspuns:

$\left. \begin{array} { l } { a \cdot b = 126 } \\ { ( a + 5 ) \cdot b = 161 } \end{array} \right.$

$a=18$

$b = 7$

Answer 2

a×b=126

(a+5)×b=161

a×b+5×b=161

126 +5×b=161

5×b=161-126

5×b=35

b=7

a×7=126

a=126:7

a=18