Question

Verify by substitution that the root of 5x − 7 = 23 is x = 6


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Answer 1

Step-by-step explanation:

if x=6

then 5x=30

so 5x-7=30-7=23

Answer 2

Answer:

Yes, x = 6 is a root of the equation 5x − 7 = 23

Step-by-step explanation:

We have to verify whether x = 6 is a root of the equation 5x − 7 = 23 by substitution method.

A number is called a root of the equation if the equation becomes equal to 0.

5x − 7 = 23

Put x = 6

(5 × 6) - 7 = 23

30 - 7 - 23 = 0

30 - 30 = 0

0 = 0

Hence verified.

So, x = 6 is a root of the equation 5x − 7 = 23.