a. x + x : 0,5 + x : 0,25 + x : 0,125 = 50 – x x 35
Tìm x:
x + x : 0,5 + x : 0,25 + x : 0,125 = 50 - x x 35
Tìm x:
x + x : 0,5 + x : 0,25 + x : 0,125 = 50 - x x 35
x+x:0,5+x:0,25+x:0,125=50-x*35
x+x*2+x*4+x*8=50-x*35
x+x*2+x*4+x*8+x*35=50
x*(1+2+4+8+35)=50
x*50=50
x=50:50
x=1
k dg cho mik nha!
a. x + x : 0,5 + x : 0,25 + x : 0,125 = 50 – x x 35
x+x:0.5+x:0.25+x:0.125=50-x x 35
x:(1+0.5+0.25+0.125)=50-x x 35
x:1.875=50-35x
x:1.875-50+35x=0
x:1.875+35x=50
bạn tự giải tiếp nha
k cho mh nhaNhóc Lạnh Lùng
Không phải, làm thế này này:
x+x:0.5+x:0.25+x:0.125=50-xx35
xx1+xx2+xx4+xx8=15
xx(1+2+4+8) =15
xx15 =15
x=15:15
x=1
a, x/0,1+x/0,25-35=35
b,x/0,125-x/0,5=108
dấu gạch là dấu chia nha giúp mình
`@` `\text {Ans}`
`\downarrow`
`a,`
\(x \div 0,1 + x \div 0,25 - 35 = 35\)
`\Rightarrow x * 10 + x * 4 - 35 = 35`
`\Rightarrow x*(10+4) - 35 = 35`
`\Rightarrow 14x - 35 = 35`
`\Rightarrow 14x = 70`
`\Rightarrow x=70/14 =5`
Vậy, `x=5`
`b,`
\(x \div 0,125 - x \div 0,5 = 108\)
`\Rightarrow x * 4/5 - x*2=108`
`\Rightarrow x*(4/5 - 2) = 108`
`\Rightarrow -6/5x = 108`
`\Rightarrow x=108 \div -6/5`
`\Rightarrow x=-90`
Vậy, `x=-90.`
a) x/0,1 + x/0,25 - 35 = 35
x . 10 + x . 4 = 35 + 35
14x = 70
x = 70 : 14
x = 5
a) x : 0,5 + x : 0,2 + x : 0,25 + x : 0,125 + x = 38
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b) (x + 2) + (x + 4) +….(x +18) + (x + 20) = 135
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Tìm x biết
a) x+ x : 0,25 + x : 0,5 + x : 0,125 = 0,45
tính nhanh:
a, 2 x 4 x 8 x 0,5 x 0,125 x 0,25 x (0,4321 + 0,5679)
b, \(\dfrac{88986x2003+1325}{88985x2003+1325}\)
tính bằng cách thuấn tiện:
a, 23,7 x 2 + 47,4 x 4
b, \(\dfrac{13}{50}\) + 74% + \(\dfrac{41}{100}\) + 0,59
Bài 2:
a: =47,4+47,4x4=47,4x5=237
b: =(0,26+0,74)+(0,41+0,59)=1+1=2
Tính bằng cách thuận tiện ( đề `b` )
`13/50+74/100+41/100+59/100`
`=>` `26/100+74/100+41/100+59/100`
`=>` `(26/100+74/100) + ( 41/100 + 59/100)`
`=>` `1+1`
`=>` `2`
tính nhanh:
`a,` \(2 × 4 × 8 × 0 , 5 × 0 , 125 × 0 , 25 × ( 0 , 4321 + 0 , 5679 )\)
`=>`\( 2 × 4 × 8 × 0 , 5 × 0 , 125 × 0 , 25 × 1\)
`=>`\(( 2 × 0 , 5 ) × ( 4 × 0 , 25 ) × ( 8 × 0 , 125 ) × 1\)
`=>`\( 1 × 1 × 1 × 1=1\)
x + x : 0,25 + x :0,5 + x : 0,125 = 0,45
tìm x
`x+x:0,25+x:0,5+x:0,125=0,45`
`x+x xx4+x xx2+x xx8=0,45`
`x xx(1+4+2+8)=0,45`
`x xx15=0,45`
`x=0,45:15=0,03`
=>x+4x+2x+8x=0,45
=>15x=0,45
hay x=0,03
Tim x biet :
a)X+X:0,5+X:0,25+X:0,125=15
a,
\(x+x:0,5+x:0,25+x:0,125=15\\ x+x:\dfrac{1}{2}+x:\dfrac{1}{4}+x:\dfrac{1}{8}=15\\ x+2x+4x+8x=15\\ x\left(1+2+4+8\right)=15\\ 15x=15\\ x=1\)