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Limonwoow
a fost răspuns

Rezolvati in R ecuatia:
a) 3 - 6x =2-4x;
b) 2x + (3 - 6x) = - 17;
c)2 (x + 1) = 3 ( x - 1);
1
d) - ( 2x - 1) =4;
2
e) 2
- (4x - 1 ) = 1
3 - -
3 9
f) 2 (x + 1 ) = - (1 - 2x).
Ajutati-ma va rog)


Răspuns :

a) 3 - 6x =2-4x;
3-2=6x-4x
2x=1
x=1/2

b) 2x + (3 - 6x) = - 17;
2x+3-6x=-17
6x-2x=17+3
4x=20
x=20:4
x=5

c)2 (x + 1) = 3 ( x - 1);
2x+2=3x-3
3x-2x=2+3
x=5

d) - ( 2x - 1) =4;
-2x+1=4
2x=1-4
2x=-3
x=-3/2

e) - (4x - 1 ) = 1
-4x+1=1
-4x=1-1
-4x=0
x=0

f) 2 (x + 1 ) = - (1 - 2x).
2x+2=-1+2x
2x-2x=-1-2
0=-3
???? Cred ca este o greseala undeva

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