-1/2(1-3)=1/3(2+1)

Solution for -1/2(1-3)=1/3(2+1) equation:

-1/2(1-3)=1/3(2+1)

We simplify the equation to the form, which is simple to understand 
-1/2(1-3)=1/3(2+1)

Simplifying:
-0.5*(1-3)=1/3*(2+1)

Simplifying:
-0.5*(1-3)=0.333333333333*(2+1)

Simplifying terms in parentheses
-0.5*(-2)=0.333333333333*(2+1)

Simplifying terms in parentheses
-0.5*(-2)=0.333333333333*(+3)

Reorder the terms in parentheses
+(+1)=0.333333333333*(+3)

Remove unnecessary parentheses
+1=0.333333333333+*(+3+)

Reorder the terms in parentheses
+1=+(+1)

Remove unnecessary parentheses
+1=+1

We move all terms containing  to the left and all other terms to the right. 
0=+1-1

We simplify left and right side of the equation. 
0=0

0=0

This equation is an identity, so all real numbers are solutions.