3x + 15=75 what is the value of x

7) A bag of candy that contains 30 pieces sells for $4,20. Another bag with 24 pieces sells for $3,60. Which bag is the better deal?

The cost C, in dollars, of renting a moving truck for a day is given by the function C (x) = 0.20x+45, where x is the number of miles driven.

In Mr. Scott's class the ratio of boys to girls is 2:3. The total number of students in Mr. Scott's class is 30. What percent of the class are girls? How many girls are in the class?

The Young Family bought 6 bags of cookies. Each bag had 15 cookies. They have since eaten 26 cookies. How many cookies do they have left.

Barack can buy a four pack of mangos for $2.76 or a six pack of mangos for $4.32. Which is the better buy? Explain.

How can a decimal be converted to percentage?

A parking lot near the sports field holds a total of 52 vehicles. There are 42 cars parked there now. Half of these cars are red, 10 are blue, and the rest are silver. What fraction of the cars are silver?

Which of the following fractions is equivalent to - 6 - (-9) •8

Solve the equation 5x - 8 < - 18

Which of the following equations has infinitely many real solutions? A) 4x + 1 = x-1 B) 4 (x-5) = 4x+20 C) 4 (x-5) = 4x-20 D) 4x + 1 = 4x-1 Which of the following equations has exactly one solution?