Answer:
Step-by-step explanation:
We can use substitution to find the value of :
Hope this helps :)
Is this more then one question?
x for 2 pointquestion y for 4 point question
x+y=40
2x+4y=100
x=40-y
80-2y+4y=100
2y=100-80
2y=20
y=10
x=40-10=30