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Middle School Archive

Browse Middle School Equations
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Selected answers to common questions:
    Solving simple linear equations.

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Two Planes and Not Enough Information [08/10/2004]

Two planes leave Chicago, one traveling due east and the other due west. The first travels 100 miles per hour faster than the second. How long will it be until they are 2000 miles apart?

Two Step Equations [02/24/1998]

How to solve two-step equations.

Two-Step Equations [01/30/2003]

What are two different two-step equations that have 1.2 as their solution?

Undefined Fractions [06/10/2005]

I am having trouble determining the difference between an undefined fraction and a fraction with no solution. Maybe you can help me determine the difference.

Understanding Parabolas [02/04/1997]

Explain why the sign of the x^2 coefficient in the equation for a parabola determines whether the parabola opens up or down?

Variables, Explained [05/05/2003]

I have problems trying to understand how to answer and work out these types of math problems: 13.7b - 6.5 = -2.3b + 8.3.

Variation on Combined Work [06/13/2002]

If you run a large pipe for 4 hours, and run a small pipe for 9 hours, you can fill 1/2 a pool. If you run both pipes together for 12 hours, you can fill the whole pool. How long would it take to fill the pool using each pipe by itself?

Writing Out Equations [12/18/1997]

How do you do equations like 6x+7 = 3x+16 ?

x - 8 = -5 [06/13/2001]

I know the answer but our teacher wants us to show all of our work and add something to both sides.

X- and Y-Intercepts [09/15/1998]

I'm having a hard time finding out how to solve an equation and then do the graph. The intercepts confuse me also...

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