To solve the equation 3x + 4x – 5 = 0, we start by simplifying the expression on the left side. First, we can combine the like terms:
3x + 4x equals 7x, so the equation becomes:
7x – 5 = 0
Next, we want to isolate the variable x. To do this, we add 5 to both sides of the equation:
7x = 5
Now, we divide each side of the equation by 7 to solve for x:
x = 5/7
Thus, the solution to the equation 3x + 4x – 5 = 0 is x = 5/7.