To solve an equation is to isolate the variable.

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Presentation transcript:

To solve an equation is to isolate the variable.

To isolate the variable means to get it alone on one side of the equation.

Given the equation, how do we isolate the x?

What number has to move to leave x alone on one side of the equation?

If we could move the seven,

If we could the x would be isolated. move the seven,

The next question is, how can we move the 7?

What is the seven doing in the equation?

What operation undoes division?

To move the 7, we just need to multiply both sides of the equation by 7.

to one side of an equation when you do something Remember...

you have to do exactly the same thing to the other side.

When we simplify,

we will have our solution.

To solve equations that involve multiplication you divide,

To solve equations that involve multiplication you divide,

and to solve equations that involve division you multiply.

and to solve equations that involve division you multiply.

Try these: