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weeeeeb [17]
3 years ago
15

For f(x) = 2x + 8, find x when f(x) = -7.

Mathematics
1 answer:
Allushta [10]3 years ago
5 0
-7 = 2x + 8

Solve for x. First subtract 8 to both sides.

-7 - (8) = 2x + 8 - (8)

-15 = 2x

Divide by 2.

-15/(2) = -2x/(2)

x = -15/2 = -7.5
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The width of a rectangle is 5 centimeters less than the length. The area is 36 square centimeters. Find the length.
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8 0
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