2 possible answers;
#1: Solve for x
Subtract 4y from both sides: 2x + 4y = 11
Divide 2 to both sides: 2x = 11 - 4y
Answer: x = -2y + 11/2
#2: Solve for y
Subtract 2x from both sides: 2x + 4y = 11
Divide both sides by 4: 4y = 11 - 2x
Answer: y = 11/4 - 1/2x