Question

Determine by substitution if -3 is the root of x-9=2x+7.​

Answer 1

Answer:

3+2x=9

Given x=3

LHS=3+2(3)=9

RHS=9

LHS=RHS

∴x=3 is root

Answer 2

Answer:

No

Step-by-step explanation:

$sol {}^{n}$

x- 9 = 2x +7

=> x - 2x = 7+ 9

=> -x = 16

=> x= -16

Since solution of the equation is - 16, So -3 is not the root of equation .