−3(−7m+n)+0.6n−4(3n+7m)

Answer 1

To simplify the expression, we can distribute the coefficients to each term inside parentheses and then combine like terms.

- 3(-7m + n) + 0.6n - 4(3n + 7m)

First, we distribute -3 to each term inside the first set of parentheses:

- 3 * -7m + 3 * n + 0.6n - 4(3n + 7m)

This simplifies to:

21m - 3n + 0.6n - 4(3n + 7m)

Next, we distribute -4 to each term inside the second set of parentheses:

21m - 3n + 0.6n - 12n - 28m

Now, let's combine like terms:

(21m - 28m) + (-3n + 0.6n - 12n) + 0.6n

This simplifies to:

-7m - 14.4n + 0.6n

Therefore, the final simplified expression is -7m - 14.4n + 0.6n.