Question

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Answer 1

Răspuns:

Explicație pas cu pas:

a) 5(2x-1)+3(x-1)-6(7x-12)=15(8-x)-84

10x-5+3x-3-42x+72=120-15x-84

13x-42x+15x=36-64

-14x=-28

x=7

b) 2(3x+4)-3x-2=6(2x-3)+2(3-4x)+5(2x-3)

6x+8-3x-2=12x-18+6-8x+10x-15

3x+6=14x-27

33=11x

x=3

c) 4(9x-4)+2(2x-7)-7x=3(3x-10)+5(x-22)-4

36x-16+4x-14-7x=9x-30+5x-110-4

33x-30=14x-144

19x=-114

x=6

d) 2(5x-4)-(3x+2)+11=-3(-5x+10)+3x-6(4x-3)

10x-8-3x-2+11=15x-30+3x-24x+18

7x+1=-6x-12

13x=-13

x=-1