Respuesta :

Good morning ☕️

Answer:

4

Step-by-step explanation:

Let’s first solve the equation:

3x + 3 =15  ⇔  3x = 15 - 3  ⇔  3x = 12  ⇔  x = 4

then  

the equation 3x + 3 =15 has a unique solu which is 4.

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:)

Hi1315

Answer:

[tex]4[/tex]

Step-by-step explanation:

[tex]3x + 3 = 15 \\ 3x = 15 - 3 \\ 3x = 12 \\ \frac{3x}{3} = \frac{12}{3} \\ x = 4[/tex]

hope this helps you..!