The function is .
Substitute the value of in the original function and solve for x. \ \
Add 20 to each side.
Divide each side by 7.5.
.
The zero of function is 2.67.
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in the original function and solve for x. \ \
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.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")