Hi! I'm stuck on this question.. please help me out -> The angles of a triangle are arranged in ascending order of magnitude. If the difference between two consecutive angles is 10 degrees, find the three angles.

The answers given are :- 50 degree, 60 degree and 70 degree

But there is no equation, just answer. So I'm wondering how the equation works

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?