Lesson: Linear Equations with Variables on Both Sides

Given that , use the information in the figure to find the perimeter of triangle .

Mason and Jacob are going on vacation together. Mason has $400 and Jacob has $350. Given that, on average, Mason spends $28 and Jacob spends $26 per day, after how many days will they have the same amount of money left?

80 students decided to buy a present for their teacher. They split into two groups of 40. In the first group, each student gave dollars. In the second group, three-fifths of the students gave dollars each, and the rest contributed a total of $288. Given that the two groups contributed the same amount, find the value of .