if 2/3 is 1/2 of 4/5 of a certain number, then that number is:怎么列式啊

if 2/3 is 1/2 of 4/5 of a certain number, then that number is:怎么列式啊 if 1/4 of 4/3 is subtracted from 2 ,what is the resulting If 1/5 of a number is 12,What is 3/10 of the same number? 2.The result of 9y -5y is always 4对么?3.The result of 4x - 4y is always 8xy对么?4.If x is an integer,the value of the expression 2x+1 must be odd对么?5.If P=4a+2b,when a=4 and b=3,P=22对么?1.-6 is greater that -4对么?2.The sum of 2 negativ if y is an integer ,then the least possible value of /23-5y/ isA (1) B(2) C(3) D(4) E(5)请说为什么? If the solution of the inequality ≥2 is the set (－3,－1),then the parameter a is . If f(x)=(3x-1)/2 and f-1 is the inverse of f,what is the value of f-1(3)? 英语翻译请翻译一下下面的几条谚语.1、If you venture nothing ,you will have nothing.2、If you make an ass of youself ,don't complain if people criticize you.3、If you ears glow ,someone is talking for you.4、IF you sell the cow ,you matlab向量问题If P1 is (1,2,3) and P2 is (-4,0,5),find(a) The vector equation of the line P1P2(b) The shortest distance between the line P1P2 and point P3(7,-1,2) 紧急!12月考 20135月SAT数学If the circumference of a cir le is doubled when its radius r is increased by 4 inches, what is the value of r, in inches?3y=2x-6 y=1-cxIn the equations above,x and y are variables and c is a constant. If no ordered 英语翻译If n is a positive integer,and if the units’ digit of n2 is 6 and the units’ digit of (n－1)2 is 9,the units’ digit of (n＋1)2 is . 英语翻译If n is a positive integer,and if the units’ digit of n2 is 6 and the units’ digit of (n－1)2 is 9,the units’ digit of (n＋1)2 is . 英语翻译1 what is the end of everything?2 what can change a pear into a pearl?3 how many letters are there in “english”?4 a word has eight letters.if you take away five letters of the word,only one is left what is this word?5 what is clean wh If a@b=(3xb)then the value of 2+(2xa)@(3@5)is急 If the ratio of the degree of exterior angle of ∠A,∠B and ∠C that are in the triangle ABC is5:4:3,then the ratio of the degree of ∠A,∠B and ∠C is( )A.5：4：3 B.3：4：5 C.1：2：3 D.3：2：1 英语翻译If 3/7 of n is 42,what is 5/7 of If x=2 is a solution of the equation 1/6[1/3(x+a/2 + 4)-7]-1/2=1,then a=____急 If x=2 is a solution of the equation1/9{1/6[1/3(x+a/2 + 4)-7]+10}=1,then a=_______