Respuesta :

Answer:

90

Step-by-step explanation:

[tex]x + 3 = 15[/tex]

Collect like terms and simplify

[tex]x = 15 - 3 \\ x = 12[/tex]

Substitute 12 for x into the equation

[tex]18 + 6x \\ 18 + 6(12) \\ 18 + 72 \\ = 90[/tex]

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