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Mathematics
Amy Sosa
26 July, 14:39
For f (x) = 2x + 8, find x when f (x) = - 7.
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Malcolm Cannon
26 July, 17:52
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-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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