Question

va rog repede...am pus 100 de puncte​

Answer 1

Răspuns:

a) 2x-5x+15+4=6x+24-2x+2-18

7x=-19    $x=-\frac{19}{7}$

b) $\frac{1}{2}({\frac{1}{2} [\frac{1}{2} (\frac{1}{2} x-1)-1]-1)-1=0$

$\frac{1}{2}({\frac{1}{2} [\frac{1}{2} (\frac{1}{2} x-1)-1]-1)=1$   /*2

${\frac{1}{2} [\frac{1}{2} (\frac{1}{2} x-1)-1]-1=2$  

${\frac{1}{2} [\frac{1}{2} (\frac{1}{2} x-1)-1]=3$   /*2

$\frac{1}{2} (\frac{1}{2} x-1)-1=6$

$\frac{1}{2} (\frac{1}{2} x-1)=7$   /*2

$\frac{1}{2} x-1=14$

$\frac{1}{2} x=15$   /*2

x=30

c) $\frac{5x-7}{2} -\frac{2x+7}{3} =3x-14$ /*6

15x-21-4x-14=18x-84

7x=49   x=7

Explicație pas cu pas: