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(5/7)x + 1/7 = 3

Subtract 1/7 from each side

(5/7)x = 2 6/7

Combine into one mixed number on the right hand side

(5/7)x = 20/7 ---> 2 6/7 becomes 7*2 + 6

Multiply both sides by (7/5) to clear the fraction in front of x

x = (20/7) * (7/5) = 140/35 = 4

So x = 4

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12y ago

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