1. k + 4k - 2k + 7

2. x+x+2+x+4

1. 3k + 7

2. 3 (x + 2)

Step-by-step explanation:

For problem 1:

the coefficient is 1 (put 1 infront of k because there's no number there)

1k + 4k - 2k + 7

collect the like terms (the variables)

(1 + 4 - 2) k + 7

then calculate

3k + 7

For problem 2:

First, collect the like terms and calculate the sum.

3x + 2 + 4

3x + 6

Then factor the expression

3 (x + 2)