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J = K+6

K + J = 4K

Replace J in the second equation

K + (K + 6) = 4K

K + K + 6 = 4K

2K + 6 = 4K

Subtract 2K from each side

6 = 2K

divide both sides by 2

3 = K

So, Keisha is 3 and therefore John is 9

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14y ago

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