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Larisaadriana27
a fost răspuns

Hello!!!

AJUTORRRRRR!!!!

AM UITAT CUM SE REZOLVAU , CINE MĂ POATE AJUTA CU ASTEA :

1) 7x -4 (2x +3) =2 (4x-3) +3 (2-x);
2) 8-5 (x-2) =4+3 (x+2) ;
3) 2 (x-1 )-3 (x-2) = 4 (x+1) -5 (2-x) ;
4) 3 (x-2) +6 = 4+3 .

Răspuns :

IMichaelll
1) 7x -4 (2x +3) =2 (4x-3) +3 (2-x)
7x - 8x -12 = 8x -6 +6-3x
15x -12 = 5x
10x = 12
x = 12/10
x = 6/5
2) 8-5 (x-2) =4+3 (x+2)
8- 5x + 10 = 4+ 3x + 6
18 - 5x = 10 + 3x
8 = 8x
x=1
3) 2 (x-1 )-3 (x-2) = 4 (x+1) -5 (2-x)
2x-2 -3x+6 = 4x +4 -10 +5x
-x +4 = 9x -6
10 = 10x
x=10
4) 3 (x-2) +6 = 4+3
3x -6 +6 = 7
3x = 7
x= 7/3