Answer:
n=21
Step-by-step explanation:
We must find n.
Remember PEMDAS. First we must do the Parentheses. Lets do distributive property by multiplying a number that is immediately outside the parentheses with each number inside the parentheses. Lets do this one side at a time.
First lets do 5(n - 7). We get 5n - 35
Now 2(n + 14) is 2n + 28
Okay...... now we have 
Now lets do OPPOSITES!!!! We must do the opposite of each thing to both sides.
The opposite of -35 is positive 35. Lets add 35 to both sides. We get:

Now lets do the opposite of 2n which is -2n

this is looking quite nice isnt it..........
The opposite of 3 times n is 3 DIVIDED BY n. So lets divide both sides by 3

amazing.......
Answer:
3/19
Step-by-step explanation: So basically you are asking for the reciprocal and the reciprocal of 19/3 is 3/19. You just basically flip the fraction around.
Answer:
%75
Step-by-step explanation:
15+14+11+20
15+20=35
14+11=25
total is 60
15 is 25% of 60
so there is %75 chance not to get pink
Answer:
A-B=x^2-x+1
Step-by-step explanation:
A-B=3x^2+5x-6+(-2x^2-6x+7)
=3x^2+5x-6-2x^2-6x+7
=x^2-x+1
Answer:
17.3077%
Step-by-step explanation:
Basically, I used this formula, which you can also use.
You can use the percentage increase formula for any percent increase calculation:
Percentage Increase=Final Value−Starting Value∣∣Starting Value∣∣×100