Hello please help i’ll give brainliest

Solve for x, y, and z. show all steps.

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!