Question

Repede, dau coroana.

Answer 1

Răspuns:

Explicație pas cu pas:

2x - 3 = 7

2x = 10

x = 5

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3x - 5 = 7

3x = 12

x = 4

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2/3 = x/2

x = 4/3

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3(4x - 5) = 2x

12x - 15 = 2x

12x - 2x = 15

10x = 15

x = 15/10 = 3/2

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3x = 4(2x - 2)

3x = 8x - 8

8x - 3x = 8

3x = 8

x = 8/3

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x/2 = 5/21

x = 10/21

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1/2 - 1/3 = 3/6 - 2/6 = 1/6

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1/4 - 1/3 = 3/12 - 4/12 = -1/12

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1/2 + 1/3 - 1/6 = 3/6 + 2/6 - 1/6 = 4/6 = 2/3

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4/5 -15/20 = 16/20 - 15/20 = 1/20

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2*2 = 3(3 - x)

4 = 9 - 3x

3x = 9 - 4 = 5

x = 5/3