3(x+a) = b

To solve this equation, we need to isolate the variable.

Starting with 3(x + a) = b, we can begin by distributing the 3 to both terms inside the parentheses:

3x + 3a = b

Next, we can subtract 3a from both sides to get the x term by itself:

3x + 3a - 3a = b - 3a

Simplifying the left side:

3x = b - 3a

And finally, dividing both sides by 3:

3x/3 = (b - 3a)/3

Simplifying further:

x = (b - 3a)/3

So, the solution to the equation is x = (b - 3a)/3.