If you want to use Excel's Goal Seek on multiple cells simultaneously, you'll need a much more powerful tool. Fortunately, one such tool comes with Excel. Let's have a look at the Solver add-in.

With this example, type "A1." Click "Solve." Excel will replace cell A1 with the equation's solution. With this example, it will insert the value "21," the equation's solution, into cell A1.

Excel macros let you automate repetitive tasks for substantial time savings. Here’s how to put them to work for you.