Solve this simultaneous equation: 3x + y = 11.

Since there is only one equation given, this is not a simultaneous equation. It is a single linear equation in two variables.

To solve for y, we can rearrange the equation to solve for y:

y = 11 - 3x

Therefore, the equation is y = 11 - 3x.

3x - y = 11

Step 1: Solve the first equation for x.

3x - y = 11
3x = y + 11
x = (y + 11)/3

Step 2: Substitute the expression for x from step 1 into the second equation.

-2x + y = 11

-2((y + 11)/3) + y = 11

-2y/3 - 22/3 + y = 11

y/3 - 22/3 = 11

y/3 = 11 + 22/3

y/3 = 55/3

y = 55

Step 3: Substitute the value of y from step 2 into the expression for x from step 1.

x = (55 + 11)/3

x = 66/3

Therefore, the solution to the system of equations is (x, y) = (22, 55).