Answer for this and why?

Consider completing a partial fraction decomposition by equating the coefficients of like powers of x. For the following expression, what would be the resulting system of equations? (You have 2 attempts.) 3x = (A + B)x + (5A - 3B) A= 5A ; B = -3B O O =A + B ; 3 = 5A - 3B O A system of equations cannot be written since there is no constant term on the left side of the equation. 3 =A +B; 0 = 5A - 3B