5(4k-2)+7(4-3k)=17

解答

5 (4 k - 2) + 7 (4 - 3 k) = 17

k = 1

求解步骤

5 (4 k - 2) + 7 (4 - 3 k) = 17

展开

5 (4 k - 2) + 7 (4 - 3 k) : - k + 18

- k + 18 = 17

将

18

到右边

- k = - 1

两边除以

- 1

k = 1

- 12 x - (- 9) 3 - 11 = \frac{- 6 x - 10}{5}

8 x - 1 = 6 x + 15

\frac{x}{7} = 3 x + \frac{5}{2}

so l v e f or a, 7 + (a + b) = (7 + a) + b

so l v e f or x, 1 - 13 w = 2 h + x