0.4(20-10x)=14x-28.
We move all terms to the left:
0.4(20-10x)-(14x-28)=0.
We add all the numbers together, and all the variables.
0.4(-10x+20)-(14x-28)=0.
We multiply parentheses.
-4x-(14x-28)+8=0.
We get rid of parentheses.
-4x-14x+28+8=0.
We add all the numbers together, and all the variables.
-18x+36=0.
We move all terms containing x to the left, all other terms to the right.
-18x=-36.
x=-36/-18.
x=+2.
Hope this helps. Brainliest?