Question

urgent va rog ofer coroană!!​

Answer 1

2 1/8 + x = 5/8

17/8 + x = 5/8 => x= 5/8 - 17/8 => x= - 12/8

7√2x - 30 = 4√2x

7√2 x=4√2 x + 30

3√2 x=30

x=10/√2

x=(10√2 )/2

x=5√2

3(7-3x)=5-5x

21-9x=5-5x  |+9x

21=5+4x

4x=21-5 => 4x=16 => x=4

9x+11 = 5

9x=5 - 11

9x=6 => x=6/9 => x=2/3

x : (-3) = 5

x= 5 * (-3)

x= - 15

•  

x² = 16

x={-4,4}

•  

x:(-√10)=7√5

-x :√10 = 7√5

- x/√10 = 7√5

- (√10 x ) / 10 = 7√5

x= - 70/√2

x=-35√2

Answer 2

Explicație pas cu pas:

3) (2•8 + 1)/8 + x = 5/8

17/8 + x = 5/8

x = 5/8 - 17/8

x = - 12/8

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4) 7√2x - 30 = 4√2x

7√2x = 4√2 x + 30

7√2x - 4√2 x = 30

3√2x = 30  |:3

√2x = 10

x = 10 : √2

x = (10√2)/2

x = 5√2

=====================

5) 3•(7 - 3x) = 5 - 5x

21 - 9x = 5 - 5x

21 = 5 - 5x + 9x

21 = 5 + 4x

21 - 5 = 4x

16 = 4x |:4

x = 4

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6) 9x + 11 = 5

9x = 5 - 11

9x = -6

x = -6 : 9

x = -2/3

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7) x : (-3) = 5

x = 5 • (-3)

x = - 15

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8) x² = 16

x² = 4²

x = 4 (x ∈ IN)

x² = 16

x² = √16

x = ± 4

x ∈ {-4, +4}

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9) x : (-√10) = 7√5 |•(-√10)

x = 7√5 • (-√10)

x = -7√50

x = - 7• 5√2

x = -35√2

==pav38=