first distribute the 5 and the 3 because the parenthesis mean to multiply
Then u have to distribute the 5 and the -3t because u must multiply everything in the parenthisis
Now your equation is
you have to get the t by itself so u can solve for t. In order to
do that u have to subtract 15 from both sides.
now your equation is -15t=15
After this you have to divde both sides by -15 because you want to isolate the value
------=1t also known as t and
There fore t=-1
To Check just plug the value back in for t.
U just have to plug in -1 into t after u have distributed the properties