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ND
3
23 tháng 2 2017
a x [3+6-1]-1968=3680
a x 8 -1968=3680
ax8=3680+1968
ax8=5648
a=706
TQ
6
20 tháng 2 2017
=\(3a+6a-1a=3680+1968\)
=\(3a+6a+1a=5648\)
\(a\left(3+6+1\right)=5648\)
\(10a=5648\)
\(a=564,8\)
SN
1
NT
1
3 tháng 2 2017
Ta có:a.3 + a.6-a-1968=3680
=>a.(3+6)-a-1968=3680
=>a.9-a-1968=3680
=>a.9-a=3680+1968
=>a.8=5648
=>a=5648:8
=>a=706
ND
2
VB
23 tháng 2 2017
ax3+ax6-a-1968=3680
ax3+ax6-ax1-1968=3680
ax(3+6-1)-1968=3680
ax8=3680+1968
ax8=5648
a=5648:8
a=706
10 tháng 1 2022
a x 3 + a x 6 - a -1968 = 3680
a x ( 3 + 6 ) - a -1968 = 3680
a x 9 - a - 1968 = 3680
a x 8 - 1968 = 3680
a x 8 = 3680 + 1968
a x 8 = 5648
a = 5648 : 8
a = 706
10 tháng 1 2022
a x 3 + a x 6 - a -1968 = 3680
a x ( 3 + 6 ) - a -1968 = 3680
a x 9 - a - 1968 = 3680
a x 8 - 1968 = 3680
a x 8 = 3680 + 1968
a x 8 = 5648
a = 5648 : 8
a = 706
TL
2 tháng 3 2017
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NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
29 tháng 6
a;(18 - 9 x 2)x (2+ 4 + 6 + 8 + 10)
= (18 - 18)x (2+ 4 + 6+ 8 +10)
= 0 x (2+ 4+ 6+ 8 + 10)
= 0
b; (7 x 8 -56): (2+ 4 + 6 +8 + 112)
= (56 - 56) : (2 +4 +6+ 8+ 112)
= 0 : (2 + 4+ 6 + 8+ 112)
= 0
c; (2 + 125 + 6 + 145 + 112) x (42 - 6 x 7)
= (2+ 125+ 6 + 145+ 112) x (42 - 42)
= (2 + 125+ 6 + 145+ 112) x 0
= 0
NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
29 tháng 6
Câu d:
(12 x 6 - 12 x 4 - 12 x 2) x (347 + 125)
= 12x(6 - 4 -2) x (347 + 125)
= 12 x (2 - 2) x (347 + 125)
= 12 x 0 x (347 + 125)
= 0 x (347 + 125)
= 0
MV
5
6 tháng 1 2019
theo bài ra ta có:
2A-20+6A=3A+A
=>8A+20=4a
=>8A-4A=-20
=>4A=-20
=>A=-5
^_^
6 tháng 1 2019
theo bài ra ta có:
2A-20+6A=3A+A
=>8A+20=4a
=>8A-4A=-20
=>4A=-20
=>A=-5
^_^
a x 3 + a x 6 - a -1968 = 3680
a x ( 3 + 6 ) - a -1968 = 3680
a x 9 - a - 1968 = 3680
a x 8 - 1968 = 3680
a x 8 = 3680 + 1968
a x 8 = 5648
a = 5648 : 8
a = 706
a x 3 + a x 6 - a -1968 = 3680
a x ( 3 + 6 ) - a -1968 = 3680
a x 9 - a - 1968 = 3680
a x 8 - 1968 = 3680
a x 8 = 3680 + 1968
a x 8 = 5648
a = 5648 : 8
a = 706