7y-3.4y=0.72
(2y-3)(-y+4)=(y-2)(y-5)-3y(y-7/3)解方程
y-12/y=?
已知(x-y)/13=y/7,则(x+y)/y=
{2x+y/3-2y=0 2(2x+y)-5=7y
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
代数式4y² - 2y + 5 = 7,那么代数式2y² - y + 1
(5y+7) x y +y=489 y等于多少
y-7-8y=2y-3-5y 咋写?
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
10y+2(7y-2)=5(4y+3)+3y怎么算
Y.
int y=7; for(;y>0;y--) { if(y%3==0) continue; printf("%d",y)