Question

Va rog!! E urgent dau coroana!!!

Answer 1

140 : ( x - 5 ) = 7

x - 5 = 140 : 7

x - 5 = 20

x = 20 + 5

x = 25

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3 x + 4 x  + 9 = 72

7 x = 72 - 9

7 x = 63

x = 63 : 7

x = 9

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6 x - 15 = 3 x + 75

6 x - 3 x = 75 + 15

3 x = 90

x = 90 : 3

x = 30

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4 ( x + 5 ) = 3 ( 2 x - 6 )

4 x + 20 = 6 x - 18

6 x - 4 x = 20 + 18

2 x = 38

x = 38 : 2

x = 19