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Rozwiąż równanie x - 7 - 2(3x + 5) = 3

Odpowiedź :

[tex]x - 7 - 2(3x + 5) = 3 \\ x - 7 - 6x - 10 = 3 \\ - 5x = 3 + 10 + 7 \\ - 5x = 20 | \div ( - 5) \\ \boxed{x = - 4}[/tex]

x-7-2(3x+5) = 3

x-7-6x-10 = 3

x-6x = 7+10+3

-5x = 20 /: (-5)

x = - 4