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6,5x + 7,1 = 20,1 va rog ajutati-ma !!!​

Răspuns :

6,5x=20,1-7,1

6,5x=13

6,5=65/10=13/2

13/2x=13

x=13×2/13

x=2

6, 5 x + 7, 1 = 20, 1

6, 5 x = 20, 1 - 7, 1

6, 5 x = 13

x = 13 : 6, 5

x = 130 : 65

x = 2