What does the left side of the equal
sign simplify to?

Step-by-step explanation:

An expression is a mathematical statement that does not contain an equal sign. It cannot be solved for unless the value of the variable is given. An equation is a mathematical statement or sentence comprised of two equalities or expressions joined with an equal sign.

First you have to multiply 30 times 60 which is 1800 then you have to subtract 1800 by 80 which is 1720, then you will multiply 1720 by 2 which is 3440. Hope this helps(: