solvefor x,4x-7y=7

解答

求解

x, 4 x - 7 y = 7

x = \frac{7 + 7 y}{4}

求解步骤

4 x - 7 y = 7

将

7 y

到右边

4 x = 7 + 7 y

两边除以

4

x = \frac{7 + 7 y}{4}

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

so l v e f or x, y - 6 = \frac{5}{6} (x - (- 14))

- 3 (x + 2) + 5 x + 12 = 18

0 = \frac{π}{4}

so l v e f or t, \frac{d N}{d t} = 5 N (1 - \frac{N}{1000}) - h N