Problem: what annual installment will discharge a debt of $ 1092 due in 3 years at 12 % simple interest ?
Rationale: "let each installment be x [ x + ( x * 12 * 1 / 100 ) ] + [ x + ( x * 12 * 2 / 100 ) ] + x = 1092 28 x / 25 + 31 x / 25 + x = 1092 x = 325 answer is d"
annotated_formula: multiply(multiply(const_100.0, divide(12, 1092)), 3)