Question

16 Rezolvați ecuațiile:
a) 2(x+1)+3(x-2)-5=266-2x)+15;

B) 2(2x - 3)-3(5-3x)=3(x+3) - 4(x+4).

Answer 1

a) 2(x+1)+3(x-2)-5=2(6-2x) + 15

2x+2 +3x-6-5= 12-4x+15

5x-9 = -4x+27

5x+4x = 27+9

9x = 36

x = 36/9 =4

b) 4x-6 -15+9x= 3x+9 -4x-16

13x-21 = -x -7

13x+x = -7+21

14x = 14

x= 14/14 = 1