解方程45x+78=129

To solve the equation 45x + 78 = 129, we will isolate the variable x.

Subtract 78 from both sides of the equation:

45x + 78 - 78 = 129 - 78

Simplifying the equation gives:

45x = 51

Now, divide both sides of the equation by 45:

45x/45 = 51/45

Simplifying further:

x = 51/45

The solution to the equation is x = 1.1333 (rounded to four decimal places).