Question

Напишите в данных выражениях скобки так чтобы перед ними был знак минус1)18-3a+5b-2c2)-26-8m+4n-7k3)x-3y-17b+c+161

Answer 1

1)(18+5b)-(3a+2c)
2)(-26+4n)-(8m+7k)

Answer 2

Expression 1: 18 - 3a + 5b - 2c

To add parentheses to the expression 18 - 3a + 5b - 2c, we can group the terms in pairs:

(18 - 3a) + (5b - 2c)

This notation indicates that the terms within each pair should be added together.

Expression 2: -26 - 8m + 4n - 7k

To add parentheses to the expression -26 - 8m + 4n - 7k, we can group the terms in pairs:

(-26 - 8m) + (4n - 7k)

Expression 3: x - 3y - 17b + c + 161

To add parentheses to the expression x - 3y - 17b + c + 161, we can group the terms in pairs:

(x - 3y) - (17b - c) + 161

Note that the minus sign before the parentheses indicates that the terms within the parentheses should be subtracted.

Please let me know if you have any further questions!