Solve the inequality.
t-5-7
The solution is

t = 12

Step-by-step explanation:

t-5=7

You need to undo subtraction, so you add 5.  Undo-ing means that you are making the ened product 0 which cancels it.  What you do to one side of the equal sign, you do to the other.  -5 plus 5 is 0 which cancels out.  The reason it is -5 is the sign in front of the 5, indicates that it is a negative 5.  You then add 5 to 7.  You are then left with

t=12

30.5*10=350$

you have to multiply the number without the decimal point then add it later but if its tenn u must move the place value of the decimal point 1 to the right.