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1) Solutia ecuatiei:
[(4,2*x-3)*2+4):4=10 este: ?


Răspuns :

[(8,4x - 6 + 4)] = 10 * 4
8,4x - 2 = 40
8,4x = 40 + 2
8,4x = 42
x = 42 : 8,4
x = 5