b) 76,22 - X x 3 = 30,61 x 2
76,22 - X x 3= 61.22
X x 3= 76,22 -61.22=15
x=5
a) X : 15 - 34,87 = 52,21 + 6
X : 15 - 34,87 = 58.21
x:15=58,21+34.87=93.08
x= 93.08:15~6.3
x:15-34,87=52,21+6 76,22-x.3=30,61.2
(=) x:15=52,21+6+34,87 (=) 76,22-x.3=61,22
(=) x:15=93,08 (=) x.3=76,22-61,22
(=) x=1369,2 (=) x.3=15
(=) x=15:3
(=)x=5
a) X : 15 - 34,87 = 52,21 + 6 b) 76,22 - X x 3=30,61 x 2
X : 15 - 34,87 = 58,21 76,22 - X x 3=61,22
X : 15 = 58,21 + 34,87 X x 3=76,22 - 61,22
X : 15= 93,08 X x 3= 15
X=93,08 x 15 X=15 : 3
X =1396,2 X= 5
Học tốt!_#2k6FA#
a) X : 15 - 34,87 = 52,21 +6 b) 76,22 - X x 3 = 30,61x2
X : 15 - 34 ,87 = 58,21 76,22 - X x 3 = 61,22
X : 15 = 58,21 + 34,87 X x 3 = 76,22-61,22
X : 15 = 93,08 X x 3 = 15
X = 93,08 x 15 X = 15 : 3
X = 1396,2 X = 5
chúc bn hok tốt ^^