a) \(210:x=2,1:0,25=8,4\)

\(x=210:8,4=25\)

b) \(x.2+x.0,5=6,25\)

\(2,5x=6,25\)

\(x=6,25:2,5=2,5\)

c) \(x:0,25-x=15,6\)

\(3x=15,6\)

\(x=5,2\)

d) \(x:12,5=3,75.4=15\)

\(x=15.12,5=187,5\)

e) \(x.12,6-x.5,6=42\)

\(7x=42\)

\(x=6\)

g) \(x:0,1-x:4-x.0,75=2,25\)

\(10x-\dfrac{x}{4}-\dfrac{3x}{4}=2,25\)

\(9x=2,25\)

\(x=0,25\)

giúp mình gấp mn

X : 0,25 - X = 15,6

X x 4 - X = 15,6

X x (4 - 1) = 15,6

X x 3 = 15,6

X = 15,6 : 3 = 5,2

x:0,25-x=15,6

\(\dfrac{x}{4}\)-x=15,6

x*(\(\dfrac{1}{4}\)-1)=15,6(vô lí vì \(\dfrac{1}{4}\)-1<0)

\(x\div0,25-x=15,6\)

\(\Rightarrow\)\(x\div\frac{1}{4}-x=15,6\)

\(\Rightarrow\)\(x\times4-x=15,6\)

\(\Rightarrow\)\(x\times\left(4-1\right)=15,6\)

\(\Rightarrow\)\(x\times3=15,6\)

\(\Rightarrow\)\(x=15,6\div3\)

\(\Rightarrow\)\(x=5,2\)

`x:0,25+x xx11=39`

`x xx4 + x xx11=39`

`x xx(4+11)=39`

`x xx15=39`

`x =13/5`

X:0,25+X x 11 =39

=> X x 4 + X x 11 =39

=> X x( 4+11) =39

=> X x 15 =39

=>         X =39 :15

=>         X=2,6

Mk cần lời giải nhé !

x:0,25-x=15,6

x.4-x=15,6

x.(4-1)=15,6

x.3=15,6

   x=15,6:3

   x=5,2

\(x:0,25-x=15,6\)

\(x:\dfrac{1}{4}-x=15,6\)

\(x\text{×}4-x\text{×}1=15,6\)

\(x\text{×}\left(4-1\right)=15,6\)

\(x\text{×}3=15,6\)

\(x=15,6:3\)

\(x=5,2\)

x :0,25 -x=15,6

X x4 -x =15,6

X -1 x4 =15,6

X -4 =15,6 

X=15,6+4

X=19,6

Tìm y:

Y : 0,25 -Y = 15,6

K MIK ĐI , MIK LÀM CHO NHƯNG 1 TIẾNG NỮA NHÉ

X : 0,25 - X = 15,6

X × 4 - X = 15,6

X × (4 - 1) = 15,6

X × 3 = 15,6

X = 15,6 : 3

X = 5,2

--------

X : 0,1 - X : 4 - X × 3/4 = 2,25

X × 10 - X × 1/4 - X × 3/4 = 2,25

X × (10 - 1/4 - 3/4) = 2,25

X × 9 = 2,25

X = 2,25 : 9

X = 0,25