Find the value of: \frac{128\div16\times?-7\times2}{7^2 —8\times6+?^2}=1

Postal or Sorting Assistants Model Paper 1 With Solutions

Question : 6 of 100

Marks: +1, -0

Find the value of:

{128÷16×?-7×2}/{7^2 —8×6+?^2}=1

Solution:

{8x -14}/{49-48+x^2}=1

⇒

8x-14=1+x^2

⇒

x^2-8x+15=0

⇒

(x-5) (x-3) = 0

x=5,3

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