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solutia ecuatiei 9x-15=7x+3


Răspuns :

9x-15 = 7x+3 <=>
9x-7x=3+15
2x = 18
x = 18: 2
x = 9
9x - 15 = 7x + 3

9x - 7x = 3 + 15

2x  = 3 + 15

2x = 18

x = 18 :  2

x = 9