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Solve the equation and find the value of the unknown X. 3x / 4 = 3x / 8, 2 / 3 △ x = 1 / 6 X ÷ (1 + 1 / 5) = 6 x 4 / 1 × 9 / 7 = 7 / 12, don't wait directly,
X △ (1 + 1 / 5) = 6
x÷6／5=6
x=6／5×6
x=36／5
1 / 4 x 7 / 9 = 7 / 12
1／4x=7／12÷7／9
1／4x=7／12×9／7
1／4x=3／4
x=3
3x out of 4 = 3 out of 8
x=3／8÷3／4
x=3／8×4／3
x=1／2
2 / 3 △ x = 1 / 6
x=2／3÷1／6
x=2／3×6
x=4
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