tìm a:
a) \(697:\frac{15.a+364}{a}=17\)
b) \(92.4-27=\frac{a+350}{a}+315\)
Những câu hỏi liên quan
Tìm A \(\in N\)
a) 697 : \(\frac{15.a+364}{a}=17\)
b) 92.4 - 27 = \(\frac{a+350}{a}+315\)
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.\(92.4-27=\frac{a+350}{a}+315\)
\(\Leftrightarrow368-27=\frac{a+350}{a}+315\)
\(\Leftrightarrow\frac{a+350}{a}+315=341\)
\(\Leftrightarrow\frac{a+350}{a}=26\)
\(\Leftrightarrow a+350=a.26\)
\(\Leftrightarrow350=a.26-a\)
\(\Leftrightarrow a.\left(26-1\right)=350\)
\(\Leftrightarrow a.25=350\)
\(\Leftrightarrow a=14\)
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Tìm số tự nhiên a:
a)697:15.a+364:a=17
b)92.4-27=a+350:a+315
697 : (15.a+364) \ a =17
92.4 -27 = (a+350) \ a+315
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\(\frac{15.a+364}{a}\)= 697:17=41
15+\(\frac{364}{a}\)=41
\(\frac{364}{a}\)=41-15=26
a=364:26
a=14
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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
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1 Tìm số tự nhiên a, biết rằng:
a) \(697:\frac{15.a+364}{a}=17\)
b)\(92.4-27=\frac{a+350}{a}+315\)
1.TÌM X,
A. 697:\(\frac{15.X+364}{X}\)=17
B. 92.4-27=\(\frac{X+350}{X}\)+315
a) \(697:\frac{15X+364}{X}=17\)
\(\Rightarrow\frac{15X+364}{X}=697:17=41\)
\(\Rightarrow15X+364=41X\)
\(\Rightarrow364=41X-15X=26X\)
\(\Rightarrow X=14\)
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A.suy ra: 15x+364/x=41
suy ra: 15x/x+364/x=41
suy ra: 15 + 364/x=41
suy ra: 364/x =26
suy ra: 364:x=26
suy ra: x= 14 (T/M)
B. 92.4-27=x+350/x+315
suy ra: 341=x/x+ 350/x +315
suy ra: 26 =1+350/x
suy ra: 25=350/x
suy ra: 350:25=x
suy ra: 14=x (T/M)
Vậy a. x=14
b. x=14
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Xem thêm câu trả lời
\(a.697:\frac{15a+364}{a}=17\)
\(b.92.4-27=\frac{a+350}{a}+315\)
a.\(697:\frac{15a+364}{a}=17\)
b.\(92.4-27=\frac{a+350}{a}+315\)
tìm x:
\(697:\frac{15.x+364}{x}=17\)
\(92.4-27=\frac{x+350}{x}+315\)
tìm x:
\(697:\frac{15.x+364}{x}=17\)
\(92.4-27=\frac{x+350}{x}+315\)
\(697:\frac{15x+364}{x}=17\)
\(\frac{15x+364}{x}=697:17=41\)
\(\frac{15x}{x}+\frac{364}{x}=41\)
\(15+\frac{364}{x}=41\)
\(\frac{364}{x}=41-15=26\)
\(x=364:26=14\)
\(92.4-27=\frac{x+350}{x}+315\)
\(\frac{x+350}{x}+315=341\)
\(\frac{x+350}{x}=341-315=26\)
\(\frac{x}{x}+\frac{350}{x}=26\)
\(1+\frac{350}{x}=26\)
\(\frac{350}{x}=26-1=25\)
\(x=350:25=14\)
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