Answer:
[tex]\Large \boxed{x=1}[/tex]
Step-by-step explanation:
Substitute m=(2x+1) and n=(6) in m+n=(9).
We are finding the value of the x variable.
[tex]2x+1+6=9[/tex]
Add the numbers on the left side of the equation.
[tex]2x+7=9[/tex]
Subtract 7 from both sides.
[tex]2x+7-7=9-7[/tex]
[tex]2x=2[/tex]
Divide both sides by 2.
[tex]\displaystyle \frac{2x}{2}=\frac{2}{2}[/tex]
[tex]x=1[/tex]
The value of the x variable is 1.
