Answer:
Step-by-step explanation:
1. 3n+4n=28
7n=28
n=4
2. 2x+7-9=10
2x=10+2
2x=12
x=6
3. 3(a+2)=-5
3a+6=-5
3a=-11
a= -11/3
4. 2(3n-1)=19
6n-2=19
6n=21
n=7/2
5. 3x-5-x+1=10
2x=14
x=7
6. -3-5=5-2a+7
2a=20
a=10
7. -5(n-2)= -15
n-2=3
n=5
8. Let the cost of each fan be y.
6y+3y=1188
9y=132
∴ The cost of each fan is $132.
