llamask37 llamask37

17-09-2020
Mathematics

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If the output of the equation f(x)=3x+7 is -2 what is the input and how do you solve it?

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Emeraldeyeddragon Emeraldeyeddragon

17-09-2020

-2 = 3x + 7

subtract 7 from both sides

-9 = 3x

divide by 3

-3 = x

check

-2 = 3 (-3) + 7

-2 = -9 + 7

-2 = -2

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