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lew lew
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12 years ago
What are the steps to solving a linear equation that has two variables that are the same?  I know it has something to do with combining like terms but I am very confused.  An example of such an equation would be 2x-7=x+6.  Thank you
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#1
12 years ago
Technically it's only two variables if they are different.  This is an equation of only one variable.

And and subtract to get all of the variables on one side and non-variables on the other.

2x - x - 7 = x - x + 6
x - 7 + 7 = 6 + 7
x = 13
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caitlinritzcaitlinritz
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12 years ago
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#3
12 years ago
The main goal is to get the intersection point (where the lines meet). To do this you must find the value of x to have the two sides of the equation equal one another. In this example you would do the following:

2x - 7 = x + 6

Subtract an 'x' from both sides.

(2x - 7) - x = (x + 6) - x
x - 7 = 6

Then add seven to both sides:

(x - 7) + 7 = 6 + 7
x = 13

You can add, multiply, divide, or subtract from either side of the equation as long as you do the same to the other side.
wrote...
#4
12 years ago
here are the steps

combine x's by subtracting 1x to the other side
x-7= 6
add 7 to both sides
x = 13
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