1. The problem statement, all variables and given/known data If I have a expression like 5lx+2l, can I multiply the 5 with x+2? 2. Relevant equations 3. The attempt at a solution I'm guessing that I can only do this if the number in front of the absolute expression is a positive number. Because if -5lx+2l=-10 then multiplying the -5 does not make sense as it would have to be + for all values of the whole expression. So I'm pretty confused about this. Thanks for the help!