The correct steps are;
7x - 4x + (2 + 1 - 5) (Distributive property)
(2+1 - 5) + (7x - 4x ) (Associative property)
-2 + 3x = 3x - 2 (commutative property)
Given the expression (7-4)x + (2 + 1 - 5)
According to the commutative property A + B = B + A
According to the distributive property A (B+C) = AB + AC
= (7-4)x + (2 + 1 - 5)
= 7x - 4x + (2 + 1 - 5) (Distributive property)
Reordering
= 7x - 4x + (2 + 1- 5)
= (2+1 - 5) + (7x - 4x ) (Associative property)
= -2 + 3x
According to commutative property
-2 + 3x = 3x - 2 (commutative property)
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