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Isolating variables

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A literal equation is an equation where variables represent known values.

Variables may represent things like distance, time, velocity, interest, slope, etc.

The slope formula is a literal equation.

                         Y = MX + B

The distance that an object falls, in t seconds, is a literal equation.

equation falling object

So you’re working on a problem, and you identified the correct formula.

What do we when the variable that you need is not by itself?

In the above equation, how do we get  t  by itself?

By isolating the variable. In this tutorial, you’ll learn how to do this.

 how to isolate a variable.

Learning Standards: Common Core Math

  • Common Core Math
  • CCSS.MATH.CONTENT.7.EE.B.4  Use variables to represent quantities in a real-world or mathematical problem, and construct simple equations and inequalities to solve problems by reasoning about the quantities.
  • CCSS.MATH.CONTENT.8.EE.C.7  Solve linear equations in one variable
  • CCSS.MATH.CONTENT.HSA.SSE.B.3  Choose and produce an equivalent form of an expression to reveal and explain properties of the quantity represented by the expression. (including isolating a variable)
  • CCSS.MATH.CONTENT.HSA.CED.A.4  Rearrange formulas to highlight a quantity of interest, using the same reasoning as in solving equations. For example, rearrange Ohm’s law V = IR to highlight resistance R.
  • http://www.corestandards.org/Math/
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