exam Maths Puzzle Numerical Ability

E (0,7) A (5,-5) T (10,7)

distance?

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Hey guys,

I really need help with them. I've been within my text, on the internet, and I can't find an example of how to do this problem.

Simplify the formula..

1 can you please help me solve by additon-or-subtraction method: (((2x+y=18 2x-y=22)))