Question

Rezolvati in R ecuatia:
a) 2(x-1)+3(x+2)=5x+4
b) 6-3(2-x)+4x=7-x
c) -1,4(5-x)+2,5(2+x)=-3,6+x
d) 5+7(1-x)-5x=x-8
Va rog mult ☕❤️

Answer 1

a) 2x-2+3x+6=5x+4

5x+4=5x+4, x∈R

b) 6-6+3x+4x=7-x

7x=7-x

8x=7=>x=7/8

c) -7+1,4x+5+2,5x=-3,6+x

-2+3,9x=-3,6+x

3,9x-x=-3,6+2

2,9x=-1,6

x=-1,6/2,9

x=-16/29

d) 5+7-7x-5x=x-8

12-12x=x-8

-13x=-20

x=20/13

Answer 2

Răspuns:

2x-2+3x+6=5x+4 ;2x+3x-5x=4+2-6 ;    0.x= 0  ; x apartine R    b)6-6+3x+4x=7-x ;   3x+4x+x=  7 ;7x=7 ; x=1 ;  c)  -7+1,4x+5+2,5x=-3,6+x ;  1,4x+2,5x-x=-3,6+7-5   2,9x =-1,6 ;  x=-16/29 ;  d)  5+7-7x-5x=x-8 ;   -7x-5x-x=-8-5-7 ;    -13x=-2o     ;x=20/13

Explicație pas cu pas: