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受欢迎的代数 >

(370)/(x+6)=3.8+0.2x

解答

\frac{370}{x + 6} = 3.8 + 0.2 x

解答

x = 31, x = - 56

求解步骤

\frac{370}{x + 6} = 3.8 + 0.2 x

在两边乘以

10

\frac{3700}{x + 6} = 38 + 2 x

在两边乘以

x + 6

3700 = 38 (x + 6) + 2 x (x + 6)

解

3700 = 38 (x + 6) + 2 x (x + 6) : x = 31, x = - 56

x = 31, x = - 56

验证解

找到无定义的点（奇点）:

x = - 6

将不在定义域的点与解相综合:

x = 31, x = - 56

作图

流行的例子

2x-6= 1/(x-2)+4

2 x - 6 = \frac{1}{x - 2} + 4

solvefor r,θ=(18-2r)/r

so l v e f or r, θ = \frac{18 - 2 r}{r}

(x^2-7x-18)/(x+2)=x-9

\frac{x ^{2} - 7 x - 18}{x + 2} = x - 9

\frac{5}{x} + 1 = 0

solvefor x,v= w/x

so l v e f or x, v = \frac{w}{x}