3(3+2x)=2(-4+3x) has how many solutions?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Jane has 5 nickels.john has 3 dimes.jane says she has a greater amount of money.with the information given,is she correct?

Is the response to the survey question "did you smoke in the last week question mark "response to the survey question "did you smoke in the last week? " a discrete random variable, a continuous random variable, or not a random variable?