4х+4(х-5)+4(х+5)=255

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To solve this equation, we first need to distribute the 4 to each term inside the parentheses:

4x + 4x - 20 + 4x + 20 = 255

Now combine like terms:

12x = 255

Divide by 12 on both sides to isolate x:

x = 255/12
x = 21.25

Therefore, the solution to the equation 4x + 4(x-5) + 4(x+5) = 255 is x = 21.25.