Puedo explicar por qué al sumar o restar dos ecuaciones que comparten una solución, se obtiene una nueva ecuación que también comparte la misma solución.
Standards Alignment
Building On
HSA-REI.C.6
Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.
Prove that, given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions.