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a) 3(2x - 4) = 2(2x -7)
b) 3x/5 + 2/5 = 4
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Odpowiedź :

XFELICITYXON
a) 3(2x - 4) = 2(2x - 7)
6x - 12 = 4x -14
6x - 4x = -14 + 12
2x = -2
x = -1
b) 3x/5 + 2/4 = 4
3x + 2 = 20
3x = 20 - 2
3x = 18
x = 6
TAŃKA123ON

a) 3(2x - 4) = 2(2x -7)

6x - 12 = 4x - 14

6x - 4x = -4 + 12

2x = -2 / :2

x = -1

b) 3x/5 + 2/5 = 4

3x/5 + 2/5 = 4 / *5

3x + 2 = 20

3x = 20 - 2

3x = 18 / : 3

x = 6

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