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

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

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

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

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

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

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

\(\Leftrightarrow a.25=350\)

\(\Leftrightarrow a=14\)

Lời giải là

92.4−27=a+350a+315

368−27=a+350a+315

341=a+350a+315

a+350a=341−315

a+350a=26

a+350=26.a

26.a−a=350

(26−1).a=350

25.a=350

a=350:25

a=14.

\(a\left(+350\right)\)

bạn ơi hình như lộn đề

?????

\(92.4-27=\frac{x+350}{x}+315\)

\(< =>368-27=\frac{x+350}{x}+315\)

\(< =>341=\frac{x+350}{x}+315\)

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

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

\(\left(x+350\right):x=26\)

\(x+350=x.26\)

\(350=x.25\)

\(x=350:25\)

\(x=14.\)

                                                           Đáp số : 14.

92.4 - 27 = ( x+ 350) / x +315

hay 341 = (x+ 350) / x +315

=> 26 = (x+ 350) / x 

=> 26x = x + 350

=> 25x = 350

=> x= 14

\(a.697:\dfrac{15a+364}{a}=17\\ =>\dfrac{15a+364}{a}=697:17=41\\ =>41a=15a+364\\ =>41a-15a=364\\ =>26a=364=>a=\dfrac{364}{26}=14 \\ b.92.4-27=\dfrac{a+350}{a}+315 \\ =>92.4-27-315=\dfrac{a+350}{a}\\ =>26=\dfrac{a+350}{a}\\ =>26a=a+350=>25a=350 \\ =>a=14\)