Answers

2016-03-07T11:43:27+05:30
3x-9=12
3x=9+12
3x=21
x=21/3
x=7.   
on a number line  and on a graph it is same. ( as x value is only there.) for number line, remove the grids and plot number 7 on the line.


Graph:
https://graphsketch.com/?eqn1_color=1&eqn1_eqn=7&eqn2_color=2&eqn2_eqn=&eqn3_color=3&eqn3_eqn=&eqn4_...


Hope this helps!
0
2016-03-07T11:53:41+05:30
Ok..
3x+9=12
3x=21
x=21/3=7
x=7
cartisan plane point on x axis (x,0) threfre we get (7,0)
0
mark it as brainly sis
The graph is at this link..----
https://graphsketch.com/?eqn1_color=1&eqn1_eqn=7&eqn2_color=2&eqn2_eqn=&eqn3_color=3&eqn3_eqn=&eqn4_...