ଠିକ୍ ଉତ୍ତରଟି ବ
(କ) 2x+(-3x) =
(ଖ) 12x -(-9x) =
(ଗ) 81 ହେଲେ xର ।
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2x + (-3x ) = (-x)
12x -(-9x) = 21x
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