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1) x=?
5*{5+5*[5+5*(x-5}])=275
2) a=? b=?
a:b=11 rest 1
a-b=99
Va rog frumos, ajutati-ma!!!


Răspuns :

5 * {5 + 5 * [5 + 5 * (x - 5)]} = 275
5 + 5 * [5 + 5 *(x - 5)] = 275 : 5
5 * [5 + 5 * (x - 5)] = 55 - 5
5 + 5 * (x - 5) = 50 : 5
5 * (x - 5) = 10 - 5
x - 5 = 5 : 5
x = 1 + 5
x = 6