4X+Y=60
When X= 14
Y=4
Z=2
X= 13 does not meet the requirements.
You can list inequalities to find groups.
x+Y = & lt; 20
4X+Y=60
Solve the equation,
You got it right 14.
If you haven't studied equations, take a look at this:
Answer: If you answer question X correctly and question Y incorrectly, you will get the following equation:
4X-Y=60
X+Y=20
X= 16,Y=4。
Mao Mao got it right 16.