2. James spends 10% of his money for movie; he also spends 20% of his money for his lunch. Then he buys $20 in his office supplies. In the next day, he spends $10 for his breakfast. Now he leaves 40% of his original money. How much does he save originally?

Question

2. James spends 10% of his money for movie; he also spends 20% of his money for his lunch. Then he buys $20 in his office supplies. In the next day, he spends $10 for his breakfast. Now he leaves 40% of his original money. How much does he save originally?
please show work.

Ms. Sue · Answer

0.1n + 0.2n + 20 + 10 + 0.4n = n 30 = n - 0.7n 30 = 0.3n 100 = n