Question

Which algebraic expression is equivalent to the expression below?


(5x + 12) + 6x





23x





(5x + 6x) + 12





(5x - 6x) + 12





(5x + 12x) + 6

Answer 1

the second , because with adding operation u can use commutative propety (you don't even need parenthesis); the result however is 11x+12

Answer 2

(A+ B) + C
= A+ (B + C) (by the associative property of addition)
= A+ (C + B) (by the commutative property of addition)
=(A+ C) + B (by the associative property of addition)