Question

Which of the following statement is not true ?

4 : 7 = 5 : 9
Rs. 5 : Rs. 25 = 12g : 60g
30 : 80 = 6 :16
12 : 36 = 14 : 42

Answer 1

Answer:

Therefore,

\begin{gathered}:\implies\sf 10y + x = (10x + y) - 54\\ \\ \\ :\implies\sf 10y - y + x - 10x = - 54\\ \\ \\ :\implies\sf 9y - 9x = - 54\\ \\ \\ :\implies\sf 9(y - x) = - 54\\ \\ \\:\implies\sf y - x = \cancel{\dfrac{-54}{9}}\\ \\ \\ :\implies\sf y - x = - 6\\ \\ \\ \dag\;{\underline{\frak{Substituting\:value\:of\:'x'\:from\:eq\:(1),}}}\\ \\ \\ :\implies\sf y - 4y = -6\\ \\ \\ :\implies\sf -3y = -6\\ \\ \\ :\implies\sf y = \cancel{\dfrac{-6}{-3}}\\ \\ \\:\implies{\underline{\boxed{\frak{\purple{y = 2}}}}}\;\bigstar\\ \\\end{gathered}

:⟹10y+x=(10x+y)−54

:⟹10y−y+x−10x=−54

:⟹9y−9x=−54

:⟹9(y−x)=−54

:⟹y−x=

9

−54

:⟹y−x=−6

†

Substitutingvalueof

′

x

′

fromeq(1),

:⟹y−4y=−6

:⟹−3y=−6

:⟹y=

−3

−6

:⟹

y=2

★

Answer 2

Answer:

your answer is given above

Step-by-step explanation:

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