GIÚP MÌNH GIẢI HAI BÀI NÀY NHÉ
a)480+45.4=(x+125:5+260)
b)x.(x+1)=2+4+6+8+10+...+2500
Cảm ƠN
480+45.4=(x+125) : 5 + 260
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GIẢI
480 + 45 . 4 = (x+125) : 5 + 260
<=> (x+125) : 5 + 260 = 660
<=> (x+125) : 5 = 660 - 260 = 400
<=> x + 125 = 400 . 5 = 2000
<=> x = 2000 - 125
<=> x = 1875
480+180=(x+125):5+260
(x+125):5=660-260
x+125=400*5
x=2000+125
x=2125
Tim x biết 480+45.4= (x+125):5+260
480 + 180 = ( x + 125 ) : 5 + 260
( x + 125 ) : 5 + 260 = 660
( x + 125 ) : 5 = 660 - 260 = 400
x + 125 = 400 . 5 = 2000
x = 2000 - 125 = 1875
480+180=(x+125):5+260
(x+125):5+260=660
(x+125):5=400
x+125=2000
x=1875
tìm x
480+45.4=(x+125):5+260
480+45.4={x+125}:5+260
480+45.4=(x+125):5+260
660=(x+125):5+260
400=(x+125):5
x+125=2000
x=1875
tìm x :
( x - 2 005 ). 2 006 = 0
d) 480 + 45.4 = ( x + 125 ) : 5 + 260
(x-2005).2006 = 0
x-2005 = 0:2006
x-2005 = 0
x = 0+2005
x = 2005
480+45.4 = (x+125):5+260
48+180 = x:5+125:5+260
228 = x:5+285
228-285 = x:5
-57 = x:5
-57.5 = x
-285 = x
Tìm x:
480=45.4=(x+125):5+260
[(x+50).50-50]:50=50
[(x+50).50-50]:50=50
(x+50).50-50=50.50
(x+50).50-50=2500
(x+50).50=2500+50
(x+50).50=2550
x+50=2550:50
x+50=51
x=51-50
x=1
Tìm x
[(x+50).50-50]:50=50
480+45.4=(x+125):5+260
1) 50x50=2500
( x+50).50=2500+50=2550
x+50 =2550:50=51
x =51-50=1
[( x + 50).50-50]:50 = 50
480 + 45.4 = (x + 125) :5 + 260;
a (x-2005). 2006=0
b 2005.(x-2006)=2005
c 480+45.4=(x+125):5+260
d [(x+50).50-50]:50=50
a) (x - 2005 ) . 2006 = 0
x - 2005 = 0 : 2006
x - 2005 = 0
x = 0 + 2005
x = 2005
b) 2005.(x-2006) = 2005
x - 2006 = 2005 : 2005
x - 2006 = 1
x = 1 + 2006
x = 2007
c) 480+45.4=(x+125) : 5 + 260
480 + 180 = (x+125) : 5 + 260
660 = ( x + 125 ) : 5 + 260
660 - 260 = ( x+ 125 ) : 5
400 = ( x + 125 ) : 5
400 x 5 = x + 125
2000 = x + 125
2000 - 125 = x
1875 = x
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