Question

Срочно помагите найдите значение выражения -2m-(6n-5m),если m-2n=12

Answer 1

-2m-(6-5m)= -24-4n-6n+60+10n =36

Answer 2

Calculation of the Expression -2m-(6n-5m)

To find the value of the expression -2m-(6n-5m), we need to substitute the given value of m-2n=12 into the expression and simplify it.

Let's substitute m-2n=12 into the expression:

-2m - (6n - 5m)

Replacing m with 12+2n:

-2(12+2n) - (6n - 5(12+2n))

Now, let's simplify the expression step by step:

-2(12+2n) - (6n - 5(12+2n)) = -24 - 4n - (6n - 60 - 10n) = -24 - 4n - 6n + 60 + 10n = -24 - 4n - 6n + 10n + 60 = -24 + 60 - 4n - 6n + 10n = 36 - 4n - 6n + 10n = 36 - (4n + 6n - 10n) = 36 - (4n - 6n + 10n) = 36 - (4 - 6 + 10)n = 36 - 8n

Therefore, the value of the expression -2m-(6n-5m) when m-2n=12 is 36 - 8n.