Answers

2014-12-07T22:40:03+08:00
2x+2(x-65)=3438
2x+2x-130=3438
4x=3568
x=892
x-65=827

Therefore,
faster plane=x=892 km/h
slower plan=x-65=827 km/h

Check:
2(892)+2(892-65)=3438
1784+2(827)=3438
1784+1654=3438
3438=3438

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