Answer:
Lan need to save more than 5 weeks to earn at least $85.00
Explanation:
Given :Lan has $25.00 in his piggy bank,and can save $12.00 from his allowance each week.
To Find : How many weeks will Ian need to save to earn at least $85.00
Solution :
Lan has $25.00 in his piggy bank
He can save per week = $12
Let x be the number of weeks
So, he can save in x weeks = 12x
So,. total saving in x weeks = 25+12x
Now we are given that Ian needs to save at least $85.00
So, Equation becomes :
![25+12x>85](https://img.qammunity.org/2019/formulas/mathematics/middle-school/dy1kwtnn70tnx3jza3gbv0yfupzrqgesl4.png)
So,
![25+12x>85](https://img.qammunity.org/2019/formulas/mathematics/middle-school/dy1kwtnn70tnx3jza3gbv0yfupzrqgesl4.png)
![12x>60](https://img.qammunity.org/2019/formulas/mathematics/middle-school/jupt9q82d9tdb12k4mvqcx6lp0nhgsz90e.png)
![x>5](https://img.qammunity.org/2019/formulas/mathematics/middle-school/fow80q5b0aon94lsgp980qclzqdj3m1h7r.png)
Hence Ian need to save more than 5 weeks to earn at least $85.00 .