y:0,125+y:0,25+y:0,5+y:0,1+y:0,01=12,4

Xét vế trái:

y:0,125+y:0,25+y:0,5+y:0,1+y:0,01

=y*8+y*4+y*2+y*10+y*100

=y*(8+4+2+10+100)

=y*124

->y:0,125+y:0,25+y:0,5+y:0,1+y:0,01=y*124

y*124=12.4

y=12.4:124

y=0.1

\(x+x:0,5+x:0,25+x:0,125=75\)

\(x+x\cdot2+x\cdot4+x\cdot8=75\)

\(x\cdot\left(1+2+4+8\right)=75\)

\(x\cdot15=75\\ x=75:15\\ x=5\)

chu pa pi bô nhà nhố

x=49,394

ok nha bạn chị google nói vậy ;))))))

toan lop 5 ma kho v

khó thế nhờ

a.124/0.25+6*124

=124*4+124*6

=124*(4+6)

=124*10=1240

a) 1240

b) 124

c) 0

`@` `\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

cảm ơn nhé

x : 0,1 = 12

x x 10 = 12

x = 12 : 10

x = 1,2

--------------------------------------------

4 : 0,25 + 320 x 0,5 + 3: 0,125

= 4 x 4 + 320 : 2 + 3 x 8

= 16 + 160 + 24

= 160 + (16 + 24)

= 160 + 40

= 200

0,04 x 0,1 x 25 = (0,04 x 25) x 0,1 = 1 x 0,1 = 0,1

4,86 x 0,25 x 40 = 4,86 x (0,25 x 40) = 4,86 x 10 = 48,6

0,125 x 6,94 x 80 = (0,125 x 80) x (6,94) = 10 x 6,94 = 69,4