Can someone me with this problem it's for the elimination method.

X + y = 101
2.5x + 1.5y = 186.50
x represents adults, y represents students

A - number of adult ticket
s -number of student ticket

1)  System of the equations:
a+s = 101 - altogether tickets,
2.5a +1.5s = 186.50 - cost of all tickets.

2) Solving of the system of the equation.

2.5a +1.5s = 186.50
a+s = 101        /* -1.5 >-1.5a - 1.5s = -1.5*101 > -1.5a - 1.5s =-151.5

2.5a +1.5s = 186.50
-1.5a - 1.5s = -151.5
a                 = 35

a+s = 101 
35 + s = 101
s =101-35
s = 66

a=35, s=66

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,