Rachel had to complete 16 pages of math homework. If she had to complete 30 more pages of math homework than reading homework How many pages did she have to complete in all?
1. Rachel had to complete 16 pages of math homework. 
2. If she had to complete 30 more pages of math homework than reading homework...
3. How many pages did she have to complete in all? 

So we know that Rachel had to complete 16 pages of math homework, and we're trying to find out how many pages of homework she had to complete in total. 

We can set up an equation to help us solve this problem: 

16 + x = 46

We know that 16 pages is how many math homework pages she had to complete, and we want to find out how many homework pages she had to complete in total, so we're solving for x. 

x = 46 - 16 
x = 30 

So Rachel had to complete a total of 46 pages of homework, 30 of which were math homework pages.