exam Maths Puzzle Numerical Ability

Can you please help me solve by graphing: (((2x=y+1 2x-y=5)))

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exam Other Question

Could you please help me with this px and the 3 I previously sent. I for got to ask you- sorry

Express the following in set-builder notation: M = {1, 2, 3, 4, 5}
simplify

-18a 6th power 4x 3rd power
______________ X ______________
x 2nd power 9a 2nd power