Help me pleaseee I don’t understand

I'll solve one from each kind

Q1)

6 = a/4 + 2 (mutiply both sides)

24 = a + 8 (move the terms)

-a = 8 - 24 (calculate)

-a = 8 - 16 (change the signs)

a = 16

Q8)

2( 2 + 5) = -2 (divide both sides)

n + 5 = -1 (move the constant to the right)

n = -1 - 5 (calculate)

n= -6

Q3)

9x - 7 = 7 (cancel equal terms)

9x = 0 (divide both sides)

x = 0

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

-2 is the right