80%X-30%X=260
0.8x-0.3x=260
0.5x=260
x=520
X+六分之一X=140
x+x/6=140
7x/6=140
x=120
猜你喜欢
- 1I made some mistakes in the English test yesterday.否定句
- 2把凸透镜正对着太阳光，可在距凸透镜15cm处得到一个最小最亮的光斑，若将某一物体放在距此透镜前20cm处，可得到一个（ ） A.正立放大的实像 B.正立放大的虚像 C.倒立放大的实像 D.倒
- 3设M大于0,根号X+3-根号X-1=M,则代数式 根号X+3+根号X-1 的值是多少?(用M表示)
- 4①f(0)=0②f(1-x)+f(x)=1③f(x/3)=(1/2)f(x),求f(1/3)+f(5/12)
- 5what made her unhappy?A.not passing the exam B.not to pass the exam C.no passing the exam .D.fail
- 6They ____ going to see my mother this Sunday.这里为
- 7____winter,it is very cold A.In the B.In C.On
- 8这个字的读音和解释；有谁知道?
- 9英语单选!a.take care of b.to take care of
- 10i lost my way in the mountain and ______made thing worse was that it began to snow.a.it b.what ...