Tìm x:
a) x–27 = 15
b) x + 38 = 83
c) 24 + x = 73
a) x − 27 = 15
x = 15 + 27
x = 42
x = 83 − 38
x = 45
x = 73 − 24
x = 49
-- Mod Toán 2
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