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受欢迎的代数 >

2/5 (5x-1)+3/10 (10x-3)=-1/2 (x-2)-6/5

解答

\frac{2}{5} (5 x - 1) + \frac{3}{10} (10 x - 3) = - \frac{1}{2} (x - 2) - \frac{6}{5}

解答

x = \frac{1}{5}

+1

十进制

x = 0.2

求解步骤

\frac{2}{5} (5 x - 1) + \frac{3}{10} (10 x - 3) = - \frac{1}{2} (x - 2) - \frac{6}{5}

展开

\frac{2}{5} (5 x - 1) + \frac{3}{10} (10 x - 3) : 5 x - \frac{13}{10}

展开

- \frac{1}{2} (x - 2) - \frac{6}{5} : - \frac{1}{5} - \frac{1}{2} x

5 x - \frac{13}{10} = - \frac{1}{5} - \frac{1}{2} x

将

\frac{13}{10}

到右边

5 x = \frac{11}{10} - \frac{1}{2} x

将

\frac{1}{2} x

para o lado esquerdo

\frac{11}{2} x = \frac{11}{10}

在两边乘以

2

11 x = \frac{11}{5}

两边除以

11

x = \frac{1}{5}

作图

流行的例子

r^{2} - r - 30 = 0

|2(x+3)^2-2x^2|< 1/10

2 (x + 3)^{2} - 2 x^{2} < \frac{1}{10}

因式分解 x^4-18x^2+81

f a c t or x^{4} - 18 x^{2} + 81

18 x - 9 > 9

x^{2} - 6 x + 40 = 6 x + 5