Consider the equation a(3 - x) = -3x + b. What values of a and b make the solution of the equation x = -4?

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

Rounded to the nearest tenth, what is the value of x

What is the least common multiple of 8, 12, 7