Question

Va rog multtt repede e urgent, dau coroana​

Answer 1

Răspuns:

a.  x= 2

b. x=100

c. x=13

d. x= 2028

Explicație pas cu pas:

a. x+3a-3b= 20

  x+ 3( a-b) = 20⇒ x+3·6 = 20 ⇒ x+18= 20  , x= 20-18 = 2

b. x(a-b) +9(a-b) = 654 ⇒x·6 +9·6= 654 ⇒6x+54= 654⇒6x=654-54

x=600/6 = 100

c. 7(a-b) +x = 55

7·6 +x=55⇒ 42 + x =55 , x=55-42 = 13

d.13 +x -(5a-5b) = 2011

  13 +x -5a+5b= 2011

   13 +x -5(a-b) = 2011

13 +x -5·6 = 2011 ⇒ 13+x -30 =2011⇒ x= 2028