Question

If 2x-5=4, then the value of 25-4x is _____ *

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Answer 1

Answer:

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Step-by-step explanation:

$2x - 5 = 4 \\ \\ 2x = 4 + 5 \\ \\ 2x = 9 \\ \\ x = \frac{9}{2}$

Now, putting value of x in 25-4x

$25 - 4 (\frac{9}{2} ) \\ \\ 25 - \cancel4 \: \: {}^{2} (\frac{9}{\cancel2} ) \\ \\ 25 - 2 \times 9 \\ \\ 25 - 18 \\ \\ = \: \: 7$

Answer 2

Answer: 7

Step-by-step explanation:

2x-5=4

So, 2x=4+5

         = 9

So, if 2x=9....then 4x=9*2

                                 =18

Coming to second part

25-4x=25-18

         =7