Question

5•(2х -1)= 15
3• (4x+5) = 39
8• (5X+ 8) = -96
- 25 •(14x +70)=0
5x+13-2x=9x+22-5x
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Answer 1

Răspuns:

Explicație pas cu pas:

5•(2х -1)= 15

10x - 5 = 15

10x = 5 + 15 = 20

x = 20 : 10 = 2

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3• (4x+5) = 39

12x + 15 = 39

12x = 39 - 15 = 24

x = 24 : 12 = 2

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8• (5X+ 8) = -96

40x + 64 = -96

40x = -96 - 64 = -160

x = -160 : 40 = -4

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- 25 •(14x +70)=0

14x + 70 = 0

x = -70 : 14 = -5

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5x+13-2x=9x+22-5x

5x - 2x -9x + 5x = 22 - 13

-x = 8

x = -8