x + 500 = 500 + 45
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x : 15;180=> x E BC khác 0
15=3.5
180=2^2.3^2.5
BCNN(15,180):3^2.2^2.5=180
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
a) 480 mm + 120 mm = 600 mm 545 mm – 45 mm= 500 mm 840 mm : 3 = 280 mm | b) 465 g + 340 g = 805g 200 g x 5 = 1000g 900 g : 6= 150g | c) 500 ml + 156 ml = 656 ml 1 000 ml – 500 ml= 500ml 250 ml x 3 = 750ml |
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
15 . (x + 1) = 20-5
15 . (x + 1) = 15
x + 1=15:15
x + 1=1
x=1-1
x=0
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
=>480 + [ 5 + 15 . (x + 1) = 500
15 . ( x + 1 )=500 - 480 - 5 = 15
x + 1 =15 : 15 =1
x =1 - 1
x = 0
vay x =0
k nha
a)
(x - 50) : 45 + 240 = 300
(x - 50) : 45 = 60
x – 50 = 2700
x = 2750
b)
7200 : [200 + (33 600 : x) - 500] = 4
200 + (33 600 : x) – 500 = 1800
33 600 : x = 2100
x = 16
x + 500 = 500 + 45
x + 500 = 545
x = 545 - 500
x = 45
có ai chuẩn bị gì tết chưa ???
x+500=500+45
x+500=545
x=545-500
x=45