Question

Which of the following equation can be formed using the value of =7 ?x

Answer 1

Step-by-step explanation:

The equation that has x=7 as a solution can be formed starting with x=7.

Solving the given equations for x

(a) 2x+1=15

⇒2x=15−1

⇒2x=14

⇒x=7

(b) x−3=4

⇒x=4+3

⇒x=7

(c) 7x−1=50

⇒7x=51

⇒x= 51

7

(d) x +5=7

2

⇒ x =7−5

2

⇒ x=2

2

⇒x=4

Hence, option (C) is correct as it does not have x=7 as a solution.

So it can not be formed using the equation x=7