Final answer:
The provided question is unclear and incomplete, making it impossible to give an exact answer. In general, the process of simplifying algebraic expressions involves eliminating terms to simplify and checking the solution's reasonableness.
Step-by-step explanation:
The student's question is unclear, seems to be a typographical error, and doesn't provide enough context or a complete mathematical expression to work with. However, based on the provided reference information, we can address the general concept of simplifying algebraic expressions and solving for unknown variables in equations.
When simplifying algebraic expressions, the goal is to eliminate terms wherever possible to reduce the expression to its simplest form. This typically involves combining like terms, using the distributive property, and cancelling out terms when possible. It's also essential to check the answer to ensure that the simplification steps have been performed correctly and that the solution is reasonable within the context of the problem.
Example Simplification Process
Considering the equations provided:
- + 61₁ + 213 − 45 = 0.
- 1₂ = 6 - 21₁.
We can see that the second equation gives us a way to express one variable in terms of the other, which is a common step in algebraic simplification.