Learning Algebra Algebra - the reunion of broken parts.

You are given the problem x + 3 = 7.

Let's go to Integer Bars Java Program by Jacobo Bulaevsky to see what this really means.

Select Setup and a window will appear.

Select Show Number to view the length for each bar.

It was 4!

Now, let's check the addition. Is 4 + 3 really equal to 7? YES! So, we solved for x correctly.

Using the Integer Bars Java Program try these:

Once you have tried them, look here to check your answers.

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