Question

x + 50 + 100 = 500 + 400

Answer 1

750

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Answer 2

x + 50 + 100 = 500 + 400

x + 50 + 100 = 900

x = 900 - 100 - 50

x = 750

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Answer 3

150

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Answer 4

x+50+100=500+400

x+150=900

x=900-150

x=750