Answer:w = 4
Step-by-step explanation: First find the common variables. It's w. You subtract 5w from 7w because they're the same variable. This will equal 12=4+2w . There's no variable to subtract anymore now you have to get the w on one side and the number on the other. Subtract 4 from 12.
This will equal 8=2w. To get rid of the w divide both sides by two .
4=w