15.A+364A=697:1715.A+364A=697:17

15.A+364A=4115.A+364A=41

15+364A=4115+364A=41

364A=41−15364A=41−15 

364A=26364A=26

A=364:26A=364:26

A=14A=14

tịt???????????????????????????????????????___________________????????????????????????????????????????????????

\(\frac{15.a+364}{a}\)= 697:17=41

15+\(\frac{364}{a}\)=41

\(\frac{364}{a}\)=41-15=26

       a=364:26

        a=14

368-27=\(\frac{a+350}{a}\)+315

314=\(\frac{a+350}{a}\)+315

\(\frac{a+350}{a}\)=341-315

\(\frac{a+350}{a}\)=26

a+350=26.a

26.a-a=350

(26-1).a=350

25.a=350

     a=350:25

     a=14

a,697:[(15.x+364):x]=17

=>(15x+364):x=679:17=41

=>\(\frac{15x}{x}+\frac{364}{x}=41\) 

=>\(15+\frac{364}{x}=41\)

=>\(\frac{364}{x}=41-15=26\)

=>\(x=\frac{364}{26}=14\)

b,92.4-27=(x+350):x+317

=>\(341=\left(x+350\right):x+317\)

=>\(\left(x+350\right):x=341-317=24\)

=>\(\frac{x}{x}+\frac{350}{x}=24\)

=>\(1+\frac{350}{x}=24\)

=>\(\frac{350}{x}=23\) => \(x=350:23=\frac{350}{23}\)

em cảm ơn ạ

a.\(697:\frac{15.a+364}{a}=17\)

\(\Leftrightarrow\frac{15.a+364}{a}=41\)

\(\Leftrightarrow15.a+364=41.a\)

\(\Leftrightarrow15.a-41.a=-364\)

\(\Leftrightarrow a.\left(15-41\right)=-364\)

\(\Leftrightarrow a.\left(-26\right)=-364\)

\(\Leftrightarrow a=14\)

b.\(92.4-27=\frac{a+350}{a}+315\)

\(\Leftrightarrow368-27=\frac{a+350}{a}+315\)

\(\Leftrightarrow\frac{a+350}{a}+315=341\)

\(\Leftrightarrow\frac{a+350}{a}=26\)

\(\Leftrightarrow a+350=a.26\)

\(\Leftrightarrow350=a.26-a\)

\(\Leftrightarrow a.\left(26-1\right)=350\)

\(\Leftrightarrow a.25=350\)

\(\Leftrightarrow a=14\)