Question

4(0.3m-2n)+6.8m, m-n=-3

Answer 1

1.2m-8n +6.8m=8m-8n=8(m-n)

8(m-n)=-24

Answer 2

To solve the expression 4(0.3m - 2n) + 6.8m, we need to simplify it step by step.

Let's start by simplifying the expression inside the parentheses: 0.3m - 2n.

Now, let's distribute the 4 to both terms inside the parentheses:

4(0.3m - 2n) = 4 * 0.3m - 4 * 2n

Simplifying further, we get:

= 1.2m - 8n

Next, we add 6.8m to the simplified expression:

1.2m - 8n + 6.8m

Now, we can combine like terms by adding the coefficients of the variable m:

(1.2m + 6.8m) - 8n

= 8m - 8n

Finally, let's consider the equation m - n = -3. We can rewrite it as m = -3 + n.

Now, we substitute the value of m in the expression 8m - 8n with -3 + n:

8(-3 + n) - 8n

Expanding further, we get:

-24 + 8n - 8n

The n terms cancel out, so we are left with:

-24

Therefore, the simplified expression 4(0.3m - 2n) + 6.8m, where m - n = -3, is equal to -24.