Question

1500 : [ ( 30.x + 40 ) ] :2 =30

Answer 1

\(1500:\left(30x+40\right):2=30\)

⇔ \(750:\left(30x+40\right)=30\)

⇒ \(30x+40=750:30=25\)

⇔ \(30x=-15\)

⇔ \(x=-\dfrac{1}{2}\)

Answer 2

Chỉ giúp em vs ah

 

Answer 3

Sửa đề: \(1500:\left[\left(30x+40\right):2\right]=30\)

\(\Rightarrow\left(30x+40\right):2=50\)

\(\Rightarrow30x+40=100\)

\(\Rightarrow30x=60\Rightarrow x=2\)

Answer 4

1500 : [(30 . x + 40)] : 2 = 30

(30 . x + 40) : 2 = 1500 : 30

(30 . x + 40) : 2 = 50

30 . x + 40 = 50 . 2

30 . x + 40 = 100

30 . x = 100 - 40

30 . x = 60

x = 60 : 30

x = 2

Answer 5

Trả lời:

1500:[(30.x+40)]:2=30

(30 . x + 40) : 2 = 1500 : 30

(30 . x + 40) : 2 = 50

30 . x + 40 = 50 . 2

30 . x + 40 = 100

30 . x = 100 - 40

30 . x = 60

x = 60 : 30

x = 2 Vậy x=2

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