có nhận ra tớ không 

x * 62 + x * 48 = 4200

x*(62+48)=4200

x*100=4200

x       =4200:100

x       =42

Mình cho x là y cho dễ nhớ.  

y x 62 + y x 48 = 4200 

y x ( 62 + 48 ) = 4200              

y x 110 = 4200 

y          = 4200 : 110

y          =  420/ 11

 Mình ko chia hết được nhé 

Ta có:

x*62+x*48=4200.

x*(62+48)=4200.

x*110=4200.

x*11=420.

x=420/11.

Vậy x=420/11.

X x 62 +X x 48=4200

(62+48)x X     =4200

110 x X         =4200

         X        =4200:110

        X        =38,18

k nha

X x 62 + X x 48 = 4200 

X x ( 62 + 48 )   = 4200

X x 110             = 4200

X                      = 4200 : 110

X                      = \(\frac{420}{11}\)

~ Chúc học tốt ~

Ai ngang qua xin để lại 1 L - I - K - E 

X x 62 +X x 48 = 4200

=> X x (62+48)=4200

=> X x 110=4200

=> X=4200:110

=> X=\(\frac{420}{11}\)

Xx62+Xx48 = 4200

Xx(62+48)=4200

Xx110=4200

X=4200:110

X=38(18)

X×62+X×48=4200

X×(62+48)=4200

X×110=4200

X =4200:110

X=\(\frac{420}{11}\)

X×62+X×48=4200

\(x\times\left(62+48\right)=4200\)

\(x\times110=4200\)

\(x=4200:110\)

\(x=\dfrac{420}{11}\)

X x 62 + X x 48= 4200

X x(62 + 48)= 4200

X x 110= 4200

X = 4200 : 110

X = 4200/ 110= 420/ 11

Dxw6d

=> x . ( 62 + 38 ) = 4200

=> x . 100 = 4200

=> x = 4200 : 100

=> x = 42

\(x\times62+x\times38=4200\)

\(x\times\left(62+38\right)=4200\) 

\(x\times100=4200\)

\(x=4200:100\)

\(x=42\)

\(x\times62+x\times38=4200\)

\(x\times\left(62+38\right)=4200\)

\(x\times100=4200\)

\(x=4200\div100=42\)

\(a.16307:y=45\left(dư\text{ }17\right)\)\(\Leftrightarrow45\text{×}y+17=16307\)

\(45\text{×}y=16307-17\)

\(45\text{×}y=16290\)

\(y=16290:45\)

\(y=362\)

\(b.y\text{×}52+y\text{×}48=36700\)

\(y\text{×}\left(52+48\right)=36700\)

\(y\text{×}100=36700\)

\(y=36700:100\)

\(y=367\)

a) 16307= 45*y+17 -> y=(16307-17)/45= 362
b) y*(52+48)= 36700 -> y=36700/100= 367

\(y\times48+y\times52=201400\)

\(y\times(48+52)=201400\)

\(y\times100=201400\)

\(y=201400:100\)

\(y=2014\)