2 câu trả lời
$\text{y - 1975 = 974 + 42017}$
$\text{y - 1975 = 42991}$
$\text{y = 42991 + 1975}$
$\text{y = 44966}$
.
$\text{y - 975 = 112 × 6}$
$\text{y - 975 = 672}$
$\text{y = 672 + 975}$
$\text{y = 1647}$
.
$\text{y - 2009 = 453 × 8}$
$\text{y - 2009 = 3624}$
$\text{y = 3624 + 2009}$
$\text{y = 5633}$
$y-1975=974+42017$
$y-1975=42991$
$y=42991+1975$
$y=44966$
$y-975=112×6$
$y-975=672$
$y=672+972$
$y=1644$
$y-2009=453×8$
$y-2009=3624$
$y=3624+2009$
$y=5633$
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