Answer:
n = 2/3
Step-by-step explanation:
[9n-9]+10=7
Subtract 10 from each side
9n -9+10-10 =7-10
9n -9 = -3
Add 9 to each side
9n -9+9 = -3+9
9n = 6
Divide by 9
9n/9 = 6/9
n = 2/3
To set up your system of equations is to have 2 equations. They both would have 1 similar variable. For example, Jenny is 5 more her brother's age. She is also 2 more than twice her brother's age. You would set this up as Y, which is Jenny, and X, her brother. Y = 5 + x and Y = 2x + 2. Make sure you put Y in the same spot in both equations. Then take the other half of the equations and simplify them. 5 + x = 2x + 2. Subtract x from both sides to get 5 = x + 2. Subtract 2 from both sides to get 3 = x. Now replace the X from both equations to get Y = 5+3, and Y = 2(3) + 2. You will see both add up to 8, which is how old Jenny is in this example. Hope this helped!
Answer:
No each price is different
Step-by-step explanation:
4/20 gives you $5 a piece
6/37.50 gives you $6.25 per wand
10/65 gives you 6.50 per wand
I think its $3.43 per pair of sock
