Question

Describe and correct the error in rewriting the expression
6(x + 7) = 6x + 13

Answer 1

6(x+7)=6x+42

Explanation:

6(x+7)=6x+13 is wrong

6*x+6*7≠6x+13 because it should be multiplied not added

6(x+7)=6x+42 is the right answer

Answer 2

Look below

Explanation:

The error was in the distribution of the 6. We can rewrite the expression as:

6(x+7)=6(x)+6(7)

This is because we need to distribute the 6 to each of the numbers in the parentheses. Therefore we would instead get:

6x+42