6x + 6y = 2700
1471 : 9 =
-3.2
how many 7 digit different number can be formed from the digits 5,5,6,6,9,9,9,using all and how many of them are greater than 9,9...
5 = V
what is 7 multiplied by 4 minus 5 plus 4 multiplied by 2
-15-8
5 4/6 x 2 2/8
-5y-8x=4
ax-15y=12
{(0;-4/5)}
a=?
