-2(3-4x)+5(2-1.6x)=4

Solution for -2(3-4x)+5(2-1.6x)=4 equation:

-2(3-4x)+5(2-1.6x)=4

We simplify the equation to the form, which is simple to understand 
-2(3-4x)+5(2-1.6x)=4

Reorder the terms in parentheses
+(-6+8x)+5*(2-1.6x)=4

Remove unnecessary parentheses
-6+8x+5+*(+2-1.6x+)=+4

Reorder the terms in parentheses
-6+8x+(+10-8x)=4

Remove unnecessary parentheses
-6+8x+10-8x=+4

We move all terms containing x to the left and all other terms to the right. 
+8x-8x=+4+6-10

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

0=0

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