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2(x-5)-7=19 ajutama
Te rog


Răspuns :

2(x - 5) - 7 = 19
2x - 10 - 7 = 19
2x = 19 + 17
x = 36 : 2
x = 18
2(x-5)-7=19
(2x-10)-7=19
2x-10=19+7
2x-10=26
2x=26+10=36
x=36:2=18