I am very confused pls help

Is the open sentence 5x-2=3x+2 true when x=2? justify your answer.

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100