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• To help us to see what we need to do in this question, I would always line the equations up one above the other, and label them (1) and (2). Here we'll say that (1) is 3x + 7y =18 and (2) is x+ 2y =...

There will be no need for state symbols.

First of all, to balance these equations, list the number of each atom, for both sides of the equation.

In this example, it would be:
...

Motifs in a novel are recurring and/or significant images. The most interesting motifs in a novel will be closely linked to integral themes running throughout. For example, in Cormac McCarthy's The Ro...