1. at the hardware store, you purchased a box of nails originally worth $17.   you had a coupon that took off 20% from the nails.   sales tax is 6%.   what is the total cost for the nails?   2. suppose we are at a restaurant and have ordered $29.31 worth of food and $9.72 worth of beverages.   the sales tax rate is 6% and we wish to leave a 20% tip.   how much is the total we will pay for this meal including tip?  

i think asking google will you get the answer to that question

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !