Question

va rog ajutatima la ecuatii

Answer 1

Răspuns:

Explicație pas cu pas:

-4x + 15 = 25 - 2x

15 - 25 = 4x - 2x

2x = -10

x = -10 : 2 = -5

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7x - 14 = 5x - 2

7x - 5x = 14 - 2

2x = 12

x = 12 : 2 = 6

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

5x + 5 = 2x - 2

5x - 2x = -2 - 5

3x = -7

x = -7/3

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2(2x - 5) = 3(x - 2) + 7

4x - 10 = 3x - 6 + 7

4x - 3x = 10 - 6 + 7

x = 11

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4(x - 1) = 5(x + 1) - 10x

4x - 4 = 5x + 5 - 10x

4x - 5x + 10x = 5 + 4

9x = 9

x = 9 : 9 = 1