two students took an examination in french, german and english.the information below show the marks for each subject and the…

two students took an examination in french, german and english.the information below show the marks for each subject and the weight to be applied to each subject.
subject French german english
student1 80 72 46
student2 64 82 40
weight 2 x 3
calculate the value of X for which the two students have the same weighted mean mark and find the value of the mean.