(6с+6z):(6c+Z)+(7c-4z):(7с+z)

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вопрос

To simplify the expression (6с+6z):(6c+Z)+(7c-4z):(7с+z), we need to perform division first and then addition.

First, let's divide the terms inside the parentheses:
(6с+6z) : (6c+Z) = 6
(7c-4z) : (7с+z) = -4

Now we can add the results:
6 + (-4) = 2

Therefore, the simplified expression is 2.