If you spent ( 15x³ + 5x² - 20x ) pesos for ( -5x ) pencils how much does each pencil cost?
A. (- 3r +X- 4) pesos
B. (-3. + x + 4) pesos
C.(-3x - x + 4) pesos
D. (- 3x + x - 4) pesos ​