exam Maths Puzzle Numerical Ability

Graph using the intercept method: x + 3y = 6.
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exam Other Question

Find two numbers such that their sum is 10 and their product is 22. solve the system using matrices. Use Gaussian elimination iwth back-substitution or Gauss-Jordan elimination:

x-2y-z=2
2x-y+z=4
-x+y-2z=-4