Ajutor, Va mulțumim!!!!
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( x + 7 - 10 ) × 2 + 10 = 60
( x + 7 - 10 ) × 2 = 60 - 10
( x + 7 - 10 ) × 2 = 50
x + 7 - 10 = 50 : 2
x + 7 - 10 = 25
x + 7 = 25 + 10
x + 7 = 35
x = 35 : 7
x = 5 .