Question

Exercise 12
Solve the followin
1. x + 2x = 9​

Answer 1

Answer:

3

Step-by-step explanation:

3x=9

=>x=9/3

=>x=3

HOPE THIS HELPS YOU:-)

Answer 2

Answer:

x= 3

Step-by-step explanation:

x+2x=9

(we can add the terms with same variables, so here coefficient of x is 1 and that of 2x is 2)

so we can add x and 2x

x+2x = 9

3x=9

(there is no sign between 3 and x in term 3x so to find the value of x we have to take 3 to the other side of '=')

when we take terms to other side , we change from addition to subtraction, from multiplication to division and vise versa

hence, x=9/3

x= 3