## Calculate the conjugate of 2+3i (complex numbers) (problem with solution)

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## Solve 2*2*x=2*3*4 (first degree equation) (problem with solution)

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## Solve x(x+3)=x^2+5 (first degree equation) (problem with solution)

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## Solve 2x/21=(3-x)/7 (first degree equation) (problem with solution)

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## Solve (x+3)^2=(x-3)^2 (first degree equation) (problem with solution)

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## Solve -2x-1=x-5 (first degree equation) (problem with solution)

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## Solve -2x+1=x-5 (first degree equation) (problem with solution)

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## Solve 2x-1=x-5 (first degree equation) (problem with solution)

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