Problem : Solve for y : 7 + y = 13

Problem : Solve for m : 17 + m + 13 - 20 = 15

Problem : Solve for k : 3k + 2 = 11

Problem : Solve for c : (6 + c)/2 = 5

Problem : Solve for u : 18 - u = 5

Problem : Solve for q : 3×(9 - q) = 27

Problem : Solve for j : 14 + j = 7