winchester890 winchester890

07-02-2021
Mathematics

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- 4 x + 9 = 21 x=___ help

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eivad405 eivad405

07-02-2021

x=-3
because
-4x=21-9
-4x= 12 divide both sides
x=-3

Answer Link

07-02-2021

Answer:

[tex] - 4x + 9 = 21 \\ - 4x = 21 - 9 \\ = 12 \\ x = \frac{12}{ - 4} \\ x = - 3[/tex]

Answer Link

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