Toán Lớp 4: giúp mình với
X + X x 2 + X x 3 + X x 4 = 216 + X x 6
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Toán Lớp 4: giúp mình với
X + X x 2 + X x 3 + X x 4 = 216 + X x 6
Comments ( 2 )
$⇔x×1 + x × 2 + x × 3 + x × 4 -x×6= 216 $
$⇔x×(1 +2+3+4-6)= 216 $
$⇔x×4= 216 $
$⇔x= 216 :4$
$⇔x= 54$
$Vậy$ $x=54$