To solve for x, we need to combine the like terms on the left-hand side of the equation and then isolate x on one side of the equation.
4a + 4a + 5a + x = 360
Combining like terms:
13a + x = 360
To isolate x, we need to subtract 13a from both sides of the equation:
x = 360 - 13a
Therefore, x is equal to 360 minus 13 times a.