Question

Rezolvati ecuațiile: a) 3(5x-2)+5-4(2x-1)=12(3-2x)=18 b) 2(5x+3)-3(2x-3)-4=7(5x-2)+3(9-3x)+5x c)3(4x-3)+5(6x-7)-5x=9(x+10)+11(x-12)+4 d) 4(6-5x)-3(x-2)+3x=4(2x-3)-3(2x-1)+5x​

Answer 1

Răspuns:

Explicație pas cu pas:

a) 3(5x-2)+5-4(2x-1)=12(3-2x)=18

ai doua egaluri; verifica ce ai scris

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b) 2(5x+3)-3(2x-3)-4=7(5x-2)+3(9-3x)+5x

10x + 6 - 6x + 9 - 4 = 35x - 14 + 27 - 9x + 5x

4x + 11 = 31x + 13

31x - 4x = 11 - 13

27x = -2

x = -2/27

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c)3(4x-3)+5(6x-7)-5x=9(x+10)+11(x-12)+4

12x - 9 + 30x - 35 - 5x = 9x + 90 + 11x - 132 + 4

37x - 44 = 20x - 38

37x - 20x = 44 - 38

17x = 6

x = 6/17

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d) 4(6-5x)-3(x-2)+3x=4(2x-3)-3(2x-1)+5x​

24 - 20x - 3x + 6 + 3x = 8x - 12 - 6x + 3 + 5x

-20x + 30 = 7x - 9

20x + 7x = 30 + 9

27x = 39

x = 39/27 = 13/9