How do I code these equations in matlab with a for loopSolut

How do I code these equations in matlab with a for loop?

Solution

1)
sum=0.0
for i=1:20000
sum=sum+0.1
end
x1=2000-sum
2)
sum=0.0
for i=1:16000
sum=sum+0.125
end
x2=2000-sum
3)
sum=0.0
for i=1:10000
sum=sum+0.2
end
x3=2000-sum
4)
sum=0.0
for i=1:8000
sum=sum+0.25
end
x4=2000-sum