Question

What is eqvalent to 3.9k - 1.9 + 1.9k - 5.7

Answer 1

the answer is equivalent to the equation (3.9k-1.9+1.9k-5.7) is 5.8k-7.9.

How is it 5.8k-7.9?
The reason is that we are combing your like terms. Since we have one with variable and without variable, we are combining your like terms.
- 3.9k+1.9k=5.8k
- -1.9+-5.7= -7.9
Then we combined the equation to get the answer.

Answer 2

5.8k - 7.6

Explanation:

3.9k - 1.9 + 1.9k - 5.7 ← collect like terms

= (3.9k + 1.9k) + (- 1.9 - 5.7)

= 5.8k + (- 7.6)

= 5.8k - 7.6