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What is the best way to classify each equation?

22-3x+7x=4(x+5)

Aidentity B. contradiction C. neither

6(2x-3=3(3-5),

Aidentity B. contradiction C. neither

6x-14=2(3x-7),

Aidentity B. contradiction C. neither

6x+3(x-4)=8(x-3)

Aidentity B. contradiction C. neither