## Exam-Style Question on Simultaneous Equations## A mathematics exam-style question with a worked solution that can be revealed gradually |

Question id: 560. This question is typical of the type of question in a IGCSE Core examination. The use of a calculator is allowed.

Nora and Dora are trying to solve the following simultaneous equations by finding the intersection of their graphs.

$$y+x=6$$ $$y-x=1$$Here are their graphs:

(a) Who has plotted the graphs most correctly?

(b) What is the correct solution?

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