Question 13367
you start out by multiplying 5 by everything inside the par.
so 5 times 2x will be 10x 
and 5 times 2 is 10
so now you have...10t-10=30


now you will add ten to both sides    10t-10=30
                                         +10+10
                                       ---------
 that then leaves you with 10t=40
then you divide both sides by 10 ten divided by ten cancels out and leaves you alone with the variable t...
ten divided by 40 is 4

so t= 4

after you find out what t is you should check your work

multiply 10 by four and subtract 10 that will leave you with thirty