PP-T2-DS165

[Huang Hsin-Yi]

165. 16527-!-item-!-187;#058&011081
If x and y are points on the number line, what is the value of x + y ?

(1) 6 is halfway between x and y.

(2) y = 2x

Ans:A

(1)是講 6在x 和y中間嗎?

[sunnyblue13s]

halfway is at a middle point in space or time between two things.

[Huang Hsin-Yi]

halfway is at a middle point in space or time between two things.

so how can you decide the values of x and y, for example x=0,y=12 or x=4 y=8, those values seems to fit (1)?

[sunnyblue13s]

it just asks you - what the value of x + y is? " not" what the value of x and y are?

How could I find you?? Using PM is a little bit inefficient.....