As you can see, I have a block of equations here and I want to number the equation, where I have \text{(1.1)} automatically with (1.1). The whole block is between "align" tags. However, the align command does not produce numbering for every line, like I was expecting it. I thought that these command, generates numbering for every line and then I just need to cross the other lines off with the \nonumber command. But align, doesn't produce here any kind of numbering.
If you would like to use just one number for an aligned multiline environment, you could use a split environment inside an equation environment, for getting a vertically centered number, such as: