Average score by word, (x+y)/2=94.
According to the average scores of several English languages,
(y+z)/2=88
According to the average score of English and Chinese,
(x+z)/2=86
So you can
x+y= 188①
x+z= 172②
y+z= 176③
Add up the above three equations.
∴2(x+y+z)=536
∴x+y+z=268④
④-①=80
④-②=96
④-③=92
A: 92 points for Chinese, 96 points for math and 80 points for English.
(Handmade, the mobile phone party can't afford to hurt TAT, so it is adopted)
Difficulties: How to determine the point M? Because the side lengths of the left right-angled triangle are 3, 4 and 5 respective