Respuesta :

shownubear1992

Answer:

3x+21=57

Step-by-step explanation:

When we use distributive property we do

[tex]3*x[/tex] and [tex]3*7[/tex] which will like this when rewritten [tex]3x+21=57[/tex]

Check answer:

[tex]3x+21=57\\-21=-21\\3x=36[/tex]      [tex]\frac{3x}{3} =\frac{36}{3}[/tex]

x=12    3(12)+21=57

36+21=57

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