Respuesta :

Kaikerscupcake
Hey there! :D

3(2+5x)=

Plug in 3 as x.

3(2+5(3))=

3(2+15)

6+45

51 is the answer.

We can always check this by plugging it in and solving for x.

3(2+5x)=51
6+15x=51
15x=45
x=3  <== this works

I hope this helps!
~kaikers