31-4(3.5)=10(3.5)+10

Solution for 31-4(3.5)=10(3.5)+10 equation:

31-4(3.5)=10(3.5)+10

We simplify the equation to the form, which is simple to understand 
31-4(3.5)=10(3.5)+10

Reorder the terms in parentheses
31+(-14)=10*(3.5)+10

Remove unnecessary parentheses
+31-14=+10+*(+3.5+)+10

Reorder the terms in parentheses
31-14=+(+35)+10

Remove unnecessary parentheses
+31-14=+35+10

We move all terms containing  to the left and all other terms to the right. 
0=+35+10-31+14

We simplify left and right side of the equation. 
0=+28

0=28

The left and right sides are not equal, therefore there is no solution. This equation is invalid.