3+7x-(2+9x)=x
We simplify the equation to the form, which is simple to understand
3+7x-(2+9x)=x
Remove unnecessary parentheses
3+7x-2-9x=x
We move all terms containing x to the left and all other terms to the right.
+7x-9x-1x=-3+2
We simplify left and right side of the equation.
-3x=-1
We divide both sides of the equation by -3 to get x.
x=0.33333333333333
