1. Twice the sum of a number and 9 is equal to three times the difference of the number and 4. Find the number

2. A car rental agency advertised renting a car for $28.95 per day and $0.28 per mile. IF kevin rents this car for 4days, how many whole miles can he drive on a $150 budget

1. The number they aren't given us can be represented by x.

2x (twice the sum of a number) + 9 (and 9) = (is equal to) 3 * (three times) (x-4 (the difference of the number and four))

2x+9=3 * (x-4)

2x+9=3x-12

9=x-12

x=21

2. He is already spending 28.95 for each day, since he is renting for four days, multiply that by four. So far he has already spent $115.80. He has (150-115.80=34.20) $34.20 left ...28 per mile is charged, and since he has 34.20 left he can only use as many times as 28 goes into 34.20. 34.20/28=your answer