PP-T1-DS-119

[aqboy[origen]]

119

A contractor combined x tons of a gravel mixture that contained 10percent gravel G, by weight, with y tons of a mixture that contained 2 percent gravel G, by weight , to produce z tons of a mixture that was 5 percent gravel G, by weight. What is the value of x?

(1) y=10

(2) z=16


ANS: D

題目看不太懂意思＠＠ 請教一下～

感謝～～～

[sunnyblue13s]

x噸的混合物有10%的G....y噸的混合物有2%的G
爲了生產z噸的混合物有著5%的G...則需要多少x?

[aqboy[origen]]

題目看懂還是不會算@@@ 麻煩一下@@@

[sunnyblue13s]

列式：0.1X+0.02Y=0.05Z

[aqboy[origen]]

z=x+y嗎??

如果是的話 那我就會算了

[sunnyblue13s]

是的~~恭喜你想出來了~~

[aqboy[origen]]

感謝~~~