Question

Renan found the sum (4.2x + 3) + (5.7x – 2) + (5 – 2.6x), as shown.

4.2x + 3 + 5.7x – 2 + 5 – 2.6x

4.2x + 5.7x + 2.6x + 3 – 2 + 5

(4.2 + 5.7 + 2.6)x + 3 – 2 + 5

12.5x + 6

What was Renan’s error in adding the expressions?
He used the commutative property incorrectly.
He used the distributive property incorrectly.
He added incorrectly.
He multiplied incorrectly.

Answer 1

ITS A DONT LISTEN TO THE OTHER PERSON

Explanation:

Answer 2

He added incorrectly.

in his second step, he should have subtracted 2.6x instead of adding 2.6x