What is Solve For x Calculator? Solve For x Calculator is an online tool used to calculate the value of one variable for the given equation. Such calculators are very useful in solving algebraic equations that have varying degrees. Students can easily solve complicated problems with this calculator. To use this solve for x calculator, enter the equation in the input box. Solve for X calculator NOTE: Enter x as the unknown variable in the polynomial. Enter an equation with one or more variables and get the solution step by step. The calculator can handle simple or complex problems and show you the result instantly. QuickMath will automatically answer the most common problems in algebra, equations and calculus faced by high-school and college students. The algebra section allows you to expand, factor or simplify virtually any expression you choose. for x,y in my_list: print(x) print(y) In this case, the for loop is still looping over each of the 4 items in my_list, but it is also doing a tuple unpacking, so the variable x gets the value of the first item in the tuple (the letter) and the variable y gets the value of the second item in the tuple (the number).