The sets of equations given below can all be solved directly after suitable reordering and rearrangement. For each set of equations:

- Identify the unknowns and confirm that there are as many of these as equations.
- Draw up an incidence table.
- Order the equations for solution and confirm that the new incidence table is lower triangular.
- Rearrange the equations to calculate appropriate output variables and rewrite them in precedence order.

3.2.2 Solutions to Questions

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