More Lessons for Heart of Algebra

More Lessons for SAT Math

More Resources for SAT

Algebra Tutorials

This video is for the redesigned SAT which is for you if you are taking the SAT in March 2016 and beyond.

Solving linear equations — Harder example

3 + 10x - 5 = (a + 1)•x - 2

In the equation shown above, a is a constant. For what value of a does the equation have infinitely many solutions?

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.