Answer:
there were 20 two point questions =
there were 30 five point questions
Step-by-step explanation:
Brandon took a 50-question exam worth a total of 160 points. There were x two-point questions and y five-point questions. How many of each type of question were on the exam?
x + y = 50 eqn 1
2x + 5y = 160 eqn 2
this can be solved using simultaneous equation
multiply eqn 1 by 2
2x + 2y = 100 eqn 3
subtract eqn 3 from 2
3y = 60
y = 20
Substitute for y in eqn 1
x + 30 = 50
x = 20
