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प्रश्न
Fill in the blank.
3x − 5 = 7 − x ⇒ x = ______
उत्तर
x = 3
3x − 5 = 7 − x
or, 3x + x = 7 + 5 [Transposing x to the L.H.S. and 5 to the R.H.S.]
or, 4x = 12
or, `(4x)/4=12/4` = 124
or, x = 3
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