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

wth khó thế

tao hahaha

? cười j 

x x 10 - x x 1414- x x3434= 1,25

x x (10 - 1414- 3434) = 1,25

x x 9 = 1,25

x = 1,25 : 9

x = 536

Mk cần lời giải nhé !

a)x÷0,25-x=15,6

X×4-x×1=15,6

X×(4-1)=15,6

X=15,6÷3

X=5,2

B)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=2,25÷9

X=1/4

Ban co the chep nhanh len chu minh khong co vip toan nen chi dung duoc mot ngay

X : 0,1 - X : 4 - X x 3 / 4 = 2 , 25

X x 10 - X x 1 / 4 - X x 3 / 4 = 2 , 25

X ( 10 - 1 / 4 - 3 / 4 ) = 2 , 25

X x 9                         = 2 , 25

X                               = 0 , 25

A : 0,1 - A : 4 - A x 3/4 = 2.25

A x 10 - A x 0,25 - A x 3/4 = 2.25

A x ( 10 - 0.25 - 3/4 )         = 2.25

A x 9                                = 2.25

A                                     =  2.25 : 9

A                                     =  0.25 

\(y:0,1-y:4-y\times\dfrac{3}{4}=2,25\)

\(y\times10-y\times\dfrac{1}{4}-y\times\dfrac{3}{4}=2,25\)

\(y\times(10-\dfrac{1}{4}-\dfrac{3}{4})=2,25\)

\(y\times9=2,25\)

\(y=2,25:9=0,25\)