Question

is 4 a root of 3x-9 =12?​

Answer 1

Step-by-step explanation:

3x-9=12

3x=12+9

3x=21

x=3/21

x=7

Answer 2

If 4 is the root

Then,

x = 4

3(4) - 9 = 12

12- 9 ≠ 12

3 ≠ 12

Or

3x = 21

x = 7

Not 4 is not the root of this equation