exam Maths Puzzle Numerical Ability

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solve by addition if a unique solution does not exist state whether the system is inconsistent or dependent.

-3x+y=8
3x-2y=-10

thanks so much

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exam Other Question

could you help me with this equation? it is from a question we had in class.

The focus of (x-1)^2 = (y-2) is_____.

i said the answer is (-2,-1)
can you tell me if i got it right? thanks for any help. multiply n^2-n-20/2n^2 multiplied by n^2+5n/n^2-25

My answer is n-4/2n Am I right? Please help, Thanks