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A + B = 39

A - B = 11

-------------- Add them together

2A + 0B = 50

Therefore A = 25

25 - B = 11

Therefore B - 14

... so replace letters with the values we now have and check that the equations are correct.

25 + 14 = 39..... correct

25 - 14 = 11...... correct

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16y ago

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