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Aflati pe x stiind ca 3^7+3^8=3^7×x

Răspuns :

[tex]3^7+3^8=3^7*x \\\\ 3^7(1+3)=3^7*x \\\\ \not3^7*4=\not3^7*x \\\\ \boxed{x=4}[/tex]
3la7(1+3)=3la7xX
3la7x4=3la7xX   ÷3la7
 4=x
x=4