Check that 4 is a divisor of 28 - 20

Question

asked Apr 9, 2023 145k views

1 Answer

Daniel Sperry · Answer 1 · 2023-04-15T06:14:36+0000

Since 4 is a divisor of 28 and 20, we will have to:

$\bold{28 = 4 * 7}$

$\bold{20 = 4 * 5}$

Subtracting member by member the previous equalities we will have:

$\bold{28 - 20 = 4*7 - 4*5}$

Taking out a common factor in the previous expression will result:

$\bold{28 - 20 = 4(7 - 5) = 4 * 2}$

That is to say, that 4 is a divisor of 28 - 20 since it is contained exactly 2 times in said difference.