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The equation is .
Solve by algebraically.
Apply subtraction property of equality: Subtract 6 from each side.
(Simplify)
Apply division property of equality: Divide each side by negative 2.
(Divide: )
The solution is 3.
Solve by graphing.
The equation is .
The related function is .
To graph the function make a table
Draw a table
x | f(x) = 2x +6 |
f(x) |
(x, f(x)) |
1 |
|
4 |
(1, 4) |
2 |
|
2 |
(2, 2) |
Use these ordered pairs to graph the equation.
1. Draw a coordinate plane.
2. Plot the points.
3. Draw a line through these points.
The graph intersects the x-axis at 3, hence the solution is 3.
The solution of the equation is 3.
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