Question

If 3x+1 =9x-1 , find the value of 21+x ​

Answer 1

Answer:

Here we need to use transposing.

Step-by-step explanation:

3x + 1 = 9x - 1

3x - 9x = -1 -1

as while going from LHS to RHS the sign change and the same in vice versa.

-6x = -2

x = -2/-6

the sign will become positive.

x = 2/6

x = 1/3

now 21 + x

21 + 1/3

make denominators same.

21 x 3 = 63

63/3 + 1/3 = 64/3

Hence 64/3 is our answer.

If you want it in mixed fraction then.

21 whole 1/3 will be the mixed fraction.

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