Question

1) Say which of the following are equations and which of them are expressions. Find the solution for each of the equations, by the trial and error method. (iv) 7a +21=0 (iii) x - 2 = 8 (vii) 9a = 18 (ix) 9-x=0​

Answer 1

Answer:

3 and 7 are equations

4 and 9 are expressions

in

4. a= -3

3. x= 10

7. a= 2

9. x= 9

Step-by-step explanation:

explanation is in the attached photo.