In elementary arithmetic, given an equation between two fractions or rational expressions, one can cross-multiply to simplify the equation or determine the value of a variable.
Solve 2i + 7j - 5k = 0 -3i + 8j + 11k = 0
Hence, we get
Therefore,
Hence, the solution is 117i - 7j + 37k = 0
Learn how to calculate the Cross Multiplication in this tutorial, given with the definition, formula and example.