Question

Ex 3 (a si b)
Va roggg!!!! Dau coroana

Answer 1

Cred ca este asa :
A)
$x \times 7 + 7 \times a \: + 7 \times b \: =$
$7 \times (x + a + b) =$
$7 \times (5 + 13) = 7 \times 18 = 126$
B)
$x \times a + x \times b - 50 =$
$x \times (a + b) - 50 =$
$5 \times 7 - 50 = 35 - 50 = - 15$