Answer :
[tex]2+6x=1-x \ \ \ |+x \\
2+7x=1 \ \ \ |-2 \\
7x=-1 \ \ \ |\div 7 \\
x=-\frac{1}{7}[/tex]
So we do the same on both sides of the equation:
First we add x - 2+7x=1
Then we take away 2- 7x=-1
Then we divide by 7- x=1/7 or -0.14
Hope I helped,
~FabSafxo