The generalisation is that multiplication is Abelian (or commutative) for numbers.
Commutivity of multiplication or the commutative property of multiplication.
1x15 3x5 5x3 15x1
All of them. 1x15,2x7.5, 3x5, 4x3.75, 5x3...
Ah, what a happy little question! The inverse operation of multiplication is division, so to find the inverse of 3x5 equals 15, you would divide 15 by 5 to get 3. Remember, math is like painting a beautiful landscape - just follow the steps with a gentle touch and you'll create something wonderful.
since 15 = 3x5 and 75 = 3x5x5 H.C.F = 5X3 = 15 !
3x5
95
seventeen over fifteen because the common denominator of 5 and 3 is 15 think about it like this: 4/5x3, 4x3=12, 5x3=15 1/3x5, 1x5=5, 3x5=15 so you get 12/15+5/15 see how they simplify back? then add the numerators and keep the denominator and you get 17/15 or 1 and 2/15
(2x3)+(3x5)-(3x2)= 2x3=6 3x5=15 3x2=6 So..... 6x25-6= 6x25=150 150+6=156
5+5+5
3/5 - 1/3 = (3x3)/(5x3) - (1x5)/(3x5) = 9/15 - 5/15 = 4/15
If you're asking what x equals, it equals 5 because 5x3=15, and 15-2=13.