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Mathematics

Answered

- 4 x + 9 = 21 x=___ help

Answer :

Eivad405go Eivad405go

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

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Rosh18go Rosh18go

Answer:

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

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