Question 1: you would divide 13 from both sides of the equation, making the answer w = 3
Question 2 : you would divide 11 from both sides of the equation, making the answer x = 5
Question 3: the answer is already there, it's r = 5
the answer is 9..
1/3m=12-m MULTIPLY BOTH SIDES BY 3
1m=36-3m ADD 3M TO BOTH SIDES
4m=46 DIVIDE BOTH SIDES BY 4
m=9
Hope the attachment helps