Question

Rezolvati in Z ecuațiile : a) |2x-1| = 11 b) |-2x-7|= 9 c) |-x-4|=8 d) 13-|2x-5| = 4 e) ||x+3|-7| = 4 f) ||x+1| -4| = 8 g) |9-|x+4| =12 i) |10- | x-3| =6 j) |9-|x-4| =11

Answer 1

a)|2x-1|=11 |+1

2x=12 |:2

x=6

b)|-2x-7|=9 |+7

-2x=16 | :(-2)

x=-8

c)|-x-4|=8

4x=8 |:4

x=2

d)13-|2x-5|=4 ?( nu mai știu, m-am derutat)

e)||x+3|-7|=4

|3x-7|=4 |+7

3x= 11 |:3

x=3,(6)

f)||x+1|-4|=8

|1x-4| =8 | +4

1x= 12 |:1

x=12

g)|9-|x+4|=12 |-9

-|4x|=3

-4x=3 |+4

x=7

h)?

i)|10-|x-3|=6 |-10

-|-3x|=-16

-3x=-16 |+3

x= -13

j)|9-|x-4|=11 |-9

-|4x|=2

-4x=2 |+4

x=6