Protected: Active 6 years ago Topics: 1Replies: 1☆ ProfileForums Topics StartedReplies CreatedEngagements Forum Replies Created Viewing 1 post (of 1 total) Author Posts January 10, 2016 at 5:53 pm #294040 nrnaMember Topics: 1Replies: 1☆ 400 is replacement? but the answer is 2000-400=1600 and then 2200-1600=600 replacement it isnt true? Author Posts Viewing 1 post (of 1 total)