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Rezolvă in Z ecuațiile:
a) 2 (x+1)=-5-(x+4)-7 (x+7)+14-(x+2);
b) 5 (x+3)+2(x+1)=-6. (x+4)+4(2x-3) + 43; c)-6-(6-[-3+(-3)+(-5-x)-7]-9)=-11;
d) 2 (x+5)+3 [3-2 (x-3)]: 3=2-(x+16)+1. ​


Răspuns :

Răspuns:

Sigur

Explicație pas cu pas:

a) 2x+2= -5-x-4-7

2x+x=-2-5-4-7

3x=-18

x=-[tex]\frac{18}{3}[/tex]=-6

b) 5x+15+2x+2=-6x-24+8x-12+43

7x+17=2x-24-12+43

7x-2x=-24-12+43-17

5x=-10

x=-[tex]\frac{10}{5}[/tex]=-2

c) -6-(6-(-18-x)-9)=-11

-6-(6+18+x-9)=-11

-6-(15+x)=-11

-6-15-x+-11

-x=-11+21

-x=10

x=-10

d) 2x+10+(3-2x+6)=2-x-16+1

2x+10+(9-2x)=-13-x

19=-13-x

x=-13-19

x=-32