To solve for x, we need to isolate x on one side of the equation.

First, we can simplify the left side of the equation by distributing the 15:

75x + 150 = 5

Next, we can isolate the x term by subtracting 150 from both sides:

75x = -145

Finally, we can solve for x by dividing both sides by 75:

x = -145/75

This can be simplified to:

x = -29/15