Tìm x biết:
a) 5 ( x+35)=515
b) (x+40).15=75.12
c) 460+85.4=(x+200):4
Tính nhanh: (23.94+93.45):(92.10-92)
B1:Tính
a,3.52-16:22
b,22.17-23.14
c,15.141+59.10
d,17.85+15.17-120
e,100-[75-(7-2)]2
g,(23.94+93.45):(92.10-92)
B2:Tìm x
a,420+65.4=(x+175):3+30
b,96-3.(x+1)=42
c,(x-47)-115=0
d,(x-36):18=12
e,2x=16
B3:Tìm x
a,60-3.(x-2)=51
b,4x-20=25:22
c,8.6+288:(x-3)2=50
mk đang càn rất gấp
Bài 3:
a: Ta có: 60-3(x-2)=51
\(\Leftrightarrow x-2=3\)
hay x=5
b: Ta có: \(4x-20=25:2^2\)
\(\Leftrightarrow4x=\dfrac{25}{4}+20=\dfrac{105}{4}\)
hay \(x=\dfrac{105}{16}\)
c: Ta có: \(8\cdot6+288:\left(x-3\right)^2=50\)
\(\Leftrightarrow288:\left(x-3\right)^2=50-48=2\)
\(\Leftrightarrow\left(x-3\right)^2=144\)
\(\Leftrightarrow\left[{}\begin{matrix}x-3=12\\x-3=-12\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=15\\x=-9\end{matrix}\right.\)
Tìm x biết:
a) x - 280 : 35 = 5.54
b) (x - 280) : 35 = 56 : 5
c) x : 15 + 42 = 13 + 25.8
d) (x - 128 + 20) : 192 = 0
e) 460 + 85.4 = (x + 200).4
f) x + 5.2 - ( 32 + 16.3 : 16 - 15) = 0
GIÚP MÌNH NHA!
tìm x biết:460+85.4=(x+200):4.kết quả x là?
Ta có: 460+85,4=(x-200):4
suy ra 460+340=(x-200):4
suy ra 800=9x-200):4
suy ra 800:4=x-200
suy ra x=3200+200=3400
tìm x, biết :
460+85.4=(x-200) :4
ta có 460+85.4=(x-200):4
<->460+340=(x-200):4
<-> 800=(x-200):4
<->800.4=x-200
->x=3200+200=3400
a)460+85.4=(x+200).4
b)x+5.2-(32+16.3:16-15)=0
a) 460 + 85 * 4 = ( x + 200 ) * 4
460 + 340 = ( x + 200 ) * 4
800 = ( x + 200 ) * 4
x + 200 = 200
x = 0
b) x + 5 * 2 - ( 32 + 16 * 3 : 16 - 15 ) = 0
x + 10 - ( 32 + 3 - 15 ) 0
x + 10 - 20 = 0
x - 10 = 0
x = 10
a) \(460+85.4=\left(x+200\right).4\)
\(\Rightarrow460+340=4x+800\)
\(\Rightarrow-4x=800-460-340\)
\(\Rightarrow-4x=0\)
\(\Rightarrow x=0\)
Vậy x = 0
b) \(x+5.2-\left(32+16.3:16-15\right)=0\)
\(\Rightarrow x+10-\left(32+3-15\right)=0\)
\(\Rightarrow x+10-20=0\)
\(\Rightarrow x-10=0\)
\(\Rightarrow x=10\)
Vậy x = 10
a, \(460+85.4=\left(x+200\right)4\)
\(460+340=\left(x+200\right)4\)
\(800=\left(x+200\right)4\)
\(\Leftrightarrow x+200=\frac{800}{4}\)
\(\Leftrightarrow x+200=200\)
\(\Rightarrow x=200-200\)
\(\Rightarrow x=0\)
Vậy \(x=0\)
460+85.4=( x +200) ÷ 4
5x=125
5x = 125
x = 3
460 + 340 = (x + 200) : 4
800 = (x + 200) : 4
x + 200 = 800 : 4
x + 200 = 200
x = 200 - 200
x = 0
Hội con 🐄 chúc bạn học tốt!!!
460 + 340 = (x+200):4
8--=(x+200):4
x+200=800:4
x+200=200
x=200-200
x=0
5^x=125
x=3
\(460+85.4=\left(x+200\right):4\)
\(\Rightarrow\left(x+200\right):4=460+85.4\)
\(\Rightarrow\left(x+200\right):4=460+340\)
\(\Rightarrow\left(x+200\right):4=800\)
\(\Rightarrow\left(x+200\right)=800.4\)
\(\Rightarrow x+200=3200\)
\(x=3200-200\)
\(x=3000\)
Vậy \(x=3000\)
b) \(5^x=125\)
\(\Rightarrow5^x=5^3\)
Cơ số giống nhau suy ra số mũ giống nhau
\(\Rightarrow x=3\)
Vậy \(x=3\)
Chúc bạn học tốt !!!
a) x-280;35=5.54
b) (x-280);35=56;5
c)x;15+42=13+25.8
d) (x-128+20);192=0
e) 460+85.4=(x+200).4
g) x+5.2-(32+16.3;16-15)=0
h) 2448;[119-(x-6)]=24
i) 20-[7.(x-3)+4]=2
k) x;[(1800+600);30]=560;(315-35)
l) [(1250-25);15];x=(450-60);130
Ai giải nhanh nhất mình tick cho
2.tìm x
C) x-6:2-(48-24.2:6-3)=0 D)x:15+42=15+25.8
E) x5.2-(32+16.3:6-15)=0 F)460+85.4=(x+200):4
tìm các số tự nhiên x bít
a, ( x - 140 ) :35 = 270
b, 180 - ( x - 45 ) : 2 = 120
c, 25 . x - 100 = 150
d,( x + 200 ) : 4 = 460 + 85.4
e, 1 + 3 + 5 + 7 + .... + x = 25
help
A, x=9590 D, x=3000
B, x=165 E, x=9
C, x=10
(x-140):35=270
x-140 = 270 x 35
x-140 = 9450
x = 9450+ 140
x = 9590
180 - ( x - 45 ) : 2 = 120
180 - ( x- 45) = 120 x 2
180 - (x - 45) = 240
x -45 = 180 - 240
x - 45 = -60
x = -60 + 45
x = -15