Question 338253
substitution


d = 14 - q


multiplying by 100 to clear decimals ___ 10d + 25q = 275


substituting for d ___ 10(14 - q) + 25q = 275 ___ 140 - 10q + 25q = 275


15q = 135 ___ q = 9


d = 14 - (9) = 5