You said that " 7x - 4x = 30 ".
From only that much information, I can see that 3x must be 30,
which leads me directly to the realization that 'x' is 10 .
(X - 30) does.
-465
36
If you add what you subtracted, you get the original number. If you subtract what you added you get the original number. 40-10=30 30+10=40
7 hours subtracted by 30 minutes = -23
(X - 30) does.
which least number should be subtracted from 1000 so that 30 divides the difference exactly
-465
36
36
If you add what you subtracted, you get the original number. If you subtract what you added you get the original number. 40-10=30 30+10=40
The number is negative 852.
7 hours subtracted by 30 minutes = -23
1980 subtracted by 2010 = -30
23 edges because a rectangle has 5 edges and 6 vertices, 5 times 6 is 30 subtracted by the number of faces(7) is 23.
-30 and -30
48