How do you answer this question?

3x - 2 - x - 3 ?

There is no way to actually solve the problem, because it is an expression (no equal sign). But what you can do it simplify the expression. Just add together the like terms, like 3x and -x, and -2 and -3. Doing this, you will get 2x-5.

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)