Question

ex 14 c d e va rog foarte mult

Answer 1

14.

c) 15·(x-1)+4·(2-3x)=9-2·(x+4)

15x - 15 + 8 - 12x = 9 - 2x - 8

15x - 12x + 2x = 9 - 8 +15 - 8

5x = 8

x = 8/3

d) 2x +5 +3·(3x - 1) = 8·(1 - 7x) + 2 + 3x

2x + 5 + 9x -3 = 8 - 56x + 2 +3x

2x +9x +56x -3x = 8 + 2 + 3 -5

64x = 8

x = 8: 64

x = 1/8

e) 10 - (3 - x) + 6· (x+2) = 13 + 7 - (2x-1)

10 - 3 + x + 6x + 12 = 13 + 7 - 2x + 1

x + 6x + 2x = 13 + 7 + 1 - 12 + 3

9x = 12

x = 4/3