-4(3/4 e+2)=7+1/2 e-8

解答

- 4 (\frac{3}{4} e + 2) = 7 + \frac{1}{2} e - 8

假

求解步骤

- 4 (\frac{3}{4} e + 2) = 7 + \frac{1}{2} e - 8

化简

- 4 (\frac{3}{4} e + 2) : - 3 e - 8

化简

7 + \frac{1}{2} e - 8 : \frac{e}{2} - 1

- 3 e - 8 = \frac{e}{2} - 1

两侧不相等

假

3.75 x = 3

\frac{1}{12} + \frac{3}{8} y = \frac{5}{12} + \frac{5}{8} y

(x + a)^{2} - (x - b)^{2} = 2 a (a - b)

3 x - 15 = 17 - x

so l v e f or x, 3 x + 5 y = 3