\(9\times x+1,85\times x=48\\ \left(9+1,85\right)\times x=48\\ 10,85\times x=48\\ x=48:10,85\\ x=\dfrac{960}{217}\)

( 124 x 237 + 687 x 86 ) : ( 870 + 235 x 122 )

= ( 29388 + 59082 ) : ( 870 + 28670 )

= 88470 : 29540

= 2,994922139...

a8+8a <--chỗ này là thế nào đây

đề sai à x+1*85 thì vít lun x+85 đi

\(25-\left(x+1\cdot85\right):3 =7\)

\(25-\frac{x}{3}+\frac{85}{3}=7\)

\(25-\left(\frac{x}{3}-\frac{85}{3}\right)=7\)

\(25-\frac{x-85}{3}=7\)

\(\frac{x-85}{3}=18\)

\(x-85=54\)

\(x=139\)

a) X : \(\dfrac{2}{7}\) = 8,27 + 19,73

X : \(\dfrac{2}{7}\) = 28

X = 28 x \(\dfrac{2}{7}\)

X = 8

b) 8,15 x X + 1,85 x X = 124

X x ( 8,15 + 1,85 ) = 124

X x 10 = 124

X = 124 : 10

X = 12,4

x.(4,6+0,6)= 7,2- 8,15

<=> x.5,2= -0,95

=>x= -0,95/5,2= -19/104

https://hoc24.vn/cau-hoi/a-5x-2x-62-50b-5x-x-150-2-3c-6x-x-511-59-31d-5x-3x-36-334-124x-2x-68-219-216.2785429565572

a: \(\Leftrightarrow7x=35\)

hay x=5

b: \(\Leftrightarrow6x=78\)

hay x=13

a: \(\Leftrightarrow6x=30\)

hay x=5

b: \(\Leftrightarrow6x=25+12-1=36\)

hay x=6

A x=5

B x = 6 (36)