Răspuns:
c) 3(x + 7) = 75; => x + 7 = 75: 3
x + 7 = 25
x = 25 - 7
x = 18
14(12 - x) = 70 => 12 - x = 70:14 70: 14 = 5
12 - x = 5
x = 12 -5
x = 13
d) (82 + y) : 6 = 17
82 + y = 17 * 6
82 + y = 90
y = 90 - 82
y = 8
(y - 33) : 9 = 305
y - 33 = 305 *9
y - 33 = 2745
y = 2745 + 33
y = 2778
PS: * = ori adica inmultire
Ex= 5*5 = 25
Sper ca te-am ajutat! <3
