Answer:
The answer is 7.3x+6
Step-by-step explanation:
Given the expression
(4.2x + 3) + (5.7x – 2) + (5 – 2.6x),
Let us repeat the solution and compare our answer to that of Renan's to validate Renan's claims
(4.2x + 3) + (5.7x – 2) + (5 – 2.6x),
Let us open up brackets
4.2x + 3+ 5.7x – 2 + 5 – 2.6x
Collecting like terms we have
4.2x+5.7x-2.6x+3-2+5
7.3x+6
The answer is 7.3x+6
From Renan's solution in line 2 the third term is meant to be -2.6x and not +2.6x