Given the variable x as your input, multiply it by three and put the result in y.
Duplicate of Problem 2980.
This user (ALBERT ALEXANDER STONIER) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV
Back to basics 9 - Indexed References
Flip the main diagonal of a matrix
Compute a dot product of two vectors x and y
2倍してみよう - ここからスタート！
What is Sum Of all elements of Matrix
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