1,680 divided by 400 = 4.2
So we know that Xian has done 4.2 laps.
4.2 divided by 14 = 0.3
0.3 x 100 = 30%
Therefore, Xian has finished 30% of the run
<h3>
Answer</h3>
They are being multiplied by 2 each time.
(2x+1)+(3x-5)=5x-4 you just have to try some of them out and see which ones work
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