Geaniiid
a fost răspuns

Va rog ajutati-ma a rezolv ecuatiile,va rog din suflet!

a) x+32=2x+2=

b) 2x-1+3=42

c) 1,2+2,3+4x=1

d) 2x+x+5x=4

Multumesc mult !

Răspuns :

Zlatanid
a) x+32=2x+2
x-2x = 2-32
-x = - 30 / x (-1)
x = 30

b) 2x-1+3=42
2x = 42-3+1
2x = 40
x = 20

c) 1,2+2,3+4x = 1
4x = 1-3.5
4x = 2,5
x = - 0,6

d) 2x+x+5x = 4
8x = 4 / : 8
x = 8/4 = 1/2
Rawanid
a) x+32=2x+2
 32-2= 2x-x⇒ x= 30. 

b) 2x-1+3=42 
  2x= 42+1-3
2x= 40⇒x= 40:2 
x= 20 

c) 1,2+2,3+4x=1 
  4x= 1-1,2-2,3
 4x=  -2,5 
x= -2,5 : 4
x= -0, 625 

d) 2x+x+5x=4 
8x= 4⇒x= 4: 8
x= 1/2 = 0,5 

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