Question

Va roog ex 2 dau coroana Rezolvatii in multimea Z ecuatiile

Answer 1

Răspuns:

Explicație pas cu pas:

a)

1 - 3(-2x + 5) = 2(x - 3)

1 + 6x - 15 = 2x - 6

6x - 14 = 2x - 6

6x - 2x = 14 - 6

4x = 8

x = 8 : 4 = 2

______________

b)

41 - 23(- 6x -15) = 5(x + 1)

41 + 138x + 345 = 5x + 5

138x + 386 = 5x + 5

138x - 5x = 5 - 386

133x = -381

x = -381/133 nu apartine lui Z

Answer 2

a) 1-3(-2x+5)=2(x-3)

1+6x-15=2x-6

6x-14=2x-6

6x-2x= -6+14

4x=8

x=2

b) 41-23(-6x-15)=5(x+1)

41+138x+345=5x+5

138x+386=5x+5

138x-5x=5-386

133x= -381

x= - 381/133∉Z