y=3x-5
3x5
95
5+5+5
The generalisation is that multiplication is Abelian (or commutative) for numbers.
3x5+4=19
7
3x5
5x3=15 is the inverse
95
(2x3)+(3x5)-(3x2)= 2x3=6 3x5=15 3x2=6 So..... 6x25-6= 6x25=150 150+6=156
5+5+5
The generalisation is that multiplication is Abelian (or commutative) for numbers.
3x5+4=19
2+3*5 = 2 + 15 = 17
Commutivity of multiplication or the commutative property of multiplication.
15/40 = (3x5)/(8x5) = 3/8
r = 3 s = 5 t = 6 rs = 3x5 = 15 rt = 3x6 = 18 st = 5x6 = 30