展开 (-4-3n)-8

解答

展开

(- 4 - 3 n) - 8

- 3 n - 12

求解步骤

(- 4 - 3 n) - 8

去除括号:

(- a) = - a

= - 4 - 3 n - 8

数字相减:

- 4 - 8 = - 12

= - 3 n - 12

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