Question

Two mathematics classes

have a total of 410 students.
The 8:00 am class has 40
more than the 10:00 am
class. How many students
are in the 10:00 am class?

Answer 1

analyze problem

make linear equations

x is 8:00 class

y is 10:00 class

x+y=410

x=y+20

subsituition

y+20+y=410

add common terms

2y+20=410

move 20 to other side

2y=410-20

subtraction

2y=390

division

y=195