Danny made a mistake in the following problem. Each line shows the steps Danny took in order to solve the problem.

The mistake was made in Line ___. Only input the number of the first incorrect line.

Line 1
21 + 35 ÷ 7 + 6(2)

Line 2
21 + 5 + 6(2)

Line 3
21 + 11(2)

Line 4
21 + 22

Line 5
43

1 answer

No idea at all?

Multiplication comes before addition. Where is that rule violated?