Question

3(0,6m+5n)-3(n-3,4m),если m+n=0,05​

Answer 1

1.8m+15n-3n-10.2m=12m+12n=12(m+n)=12×0.05=0.6

Ответ: 0.6.

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Answer 2

To simplify the expression 3(0.6m + 5n) - 3(n - 3.4m) when m + n = 0.05, we first need to substitute the value of m + n into the expression. Let's do that:

Given: m + n = 0.05

Now, substitute this value into the expression:

3(0.6m + 5n) - 3(n - 3.4m)

= 3(0.6m + 5n) - 3n + 10.2m (distribute the 3 in the second term)

Now, we need to find the value of m and n using the given condition m + n = 0.05.

Let's solve for one of the variables and then substitute it into the expression.

Given: m + n = 0.05

Since m + n = 0.05, we can express n in terms of m:

n = 0.05 - m

Now, substitute this value into the expression we obtained earlier:

3(0.6m + 5n) - 3n + 10.2m

= 3(0.6m + 5(0.05 - m)) - 3(0.05 - m) + 10.2m

= 3(0.6m + 0.25 - 5m) - 0.15 + 3m + 10.2m

= 1.8m + 0.75 - 15m - 0.15 + 13.2m

Now, combine the like terms:

= (1.8m - 15m + 13.2m) + (0.75 - 0.15)

= -0.2m + 0.6

So, the simplified expression is -0.2m + 0.6.