Question

Rezolvati va rog ecuatiile
2(x - 2) = x + 5
11 - (x + 5) = -14
-3x+7=20
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Answer 1

Răspuns:

1 30 4,(3)sau13 supra 3

Explicație pas cu pas:

2(x-2)=x+5

2•x+2•(-2)=x+5

2x+(-4)=x+5

2x-x=5-4

x=1

11-(x+5)=-14

11-x+5=-14

-x=-14-11-5

-x=-30/:-1

×= 30

-3x+7=20

-3x=20-7

-3x=13/:-3

x=13 supra 3 sau 4,(3)

Answer 2

Răspuns:

2(x-2)=×+5

2x-4=×+5

2x-x=5+4

1x=9

x=9/1

×=9

11-(x+5)=-14

x=-14-5-11

x=-19-11

x=-30

-3x+7=20

-3x=20-7

-3x=13

x=13/-3