15+x=678-x=500:x=45+x=5674
x+120=500+560
x+345=678-321
x + 120 =500+560 x + 345 =678-321
x+120 = 1060 x + 345 =357
x =1060-120 x = 357-345
x = 940 x = 12
x+120=500+560
x=940
x+345=678-321
x=12
ket qua chuan luon do ban nho k cho minh nha
x+120=500+560
x+120=1060
x=1060-120
x=940
x+345=678-321
x+345=357
x=357-345
x=12
45 678 : x + 1 234 : x = 32
Tìm x
1678 + X = 998 x 45 1152 + 678 + X = 99912
178 941 : X = 21 X x 48 = 153648
\(1678+x=998\times45\)
\(1678+x=44910\)
\(x=49910-1678\)
\(x=43232\)
\(178941:x=21\)
\(x=178941:21\)
\(x=8521\)
\(1152+678+x=99912\)
\(1830+x=99912\)
\(x=99912-1830\)
\(x=98082\)
\(x\times48=15348\)
\(x=153648:48\)
\(x=3201\)
Bài 2 tính nhanh a,15 x 2121/4343 + 15 x 222222/434343 b,399 x 45 + 55 x 399/1995 x 1996 - 1991 x 1995 c,1996 x 1995 - 996/1000 + 1996 x 1994 d,637 x 527 - 189/526 x 637 + 448 e,677 x 874 + 251/678 x 874 - 623 khẩn cấp huhuhu.......... aaaaaaaaaa
a, 15(21/43+22/43)=15.1=15
b, 399(45+55) / 1995(1996-1991)
=399.100 / 1995.5
=4
tìm x :
4.120+[45:9+15-(x+1)]=500
4.120+[45:9+15-(x+1)]=500
480+[45:9+15-(x+1)]=500
45:9+15-(x+1)=500-480
45:9+15-(x+1)=20
5+15-(x+1)=20
20-(x+1)=20
x+1=20-20
x+1=0
x=0-1
x=-1
=>4.120+[45:9+15-(x+1)]=500
=>480+[45:9+15-(x+1)]=500
=>45:9+15-(x+1)=500-480
=>45:9+15-(x+1)=20
=>5+15-(x+1)=20
=>20-(x+1)=20
=>x+1=20-20
=>x+1=0
=>x=0-1
=> x=-1
Tìm x biết 4.120+[45:9+15(x+1)]=500
4.120+[45:9+15(x+1)]=500
=>480+[5+15(x+1)]=500
=>5+15(x+1)=20
=>15(x+1)=15
=>x+1=1
=>x=0
4.120+[45:9+15(x+1)]=500
480+[5+15x+15]=500
480+5+15x+15=500
500+15x=500
15x=0
x=0
678 + 122 =?
tim x
x - 500 = 1000
x + 65 = 76
ai tick mình mình tick lại
bài 1 :
678 + 122 = 800
bài 2 :
a ) x - 500 = 1000
x = 1000 - 500
x = 500
b ) x + 65 = 76
x = 76 + 65
x = 11
k nha mọi người !
678+122=800
x-500=1000
=>x=1000+500
=>x=1500
x+65=76
=>x=76-65
=>x=11
678+122=800
x-500=1000 x=1500
x+65=76 x=11
a) x + 123 - 45 = 678
b) 78 - 56 + x = 234
x + 123 - 45 = 678
x= 678 + 45 - 123
x = 600
78 - 56 + x = 234
22 + x = 234
x = 234 - 22
x = 212
Linh Nguyễn sai rồi
a) x+123-45=678
=>x+78=678
=>x=678-78
=>x=600
tíc mình nha
a) x + 123 - 45 = 678
x = 678 + 45 - 123
x = 600
b)78 - 56 + x = 234
56 + x = 76 - 234
56 + x = -158
x = -158 - 56
x = -214
nha bn
chúc bn học giỏi
60 x 45 - 678 =
60 * 45 - 678
= 2700 - 678
= 2022
Đúng 100%