Question

Which of the following equations cannot have x=7as the solution? a) 2x+1=15 b) 7x−1=50 c) x−3=4d) x7−1=0

Answer 1

Answer:

d] x7−1=0

Step-by-step explanation:

d] because; 7x-1=0

                     7x=1

                        x=1/7

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Answer 2

Answer:

A) √

B) ×

C) √

D) ×

Step By Step

A) LHS ( Left Hand Side)      

 =15-1                                

  =14

  =2x - 14

  =x - 14/2

  =7 √

B) LHS ( Left Hand Side)

  =50+1

  =51

  =7x - 51

  =x - 51/7

  =7.28571428571 ×

C) LHS ( Left Hand Side)

  =4+3

  =7 √

D) LHS ( Left Hand Side)

  =0+1

  = 1/7 ×