Pakai cara 1.Akar dari -3x+28<_7x-12 adalah A x>_4 B x>_10 C x<_4 D x<_10

[tex]-3x+28 \leq 7x-12 \\ -3x-7x \leq -12-28 \\ -10x \leq -40 \\ x \geq 4[/tex]

Jawaban A

[tex]-3x + 28 \leq 7x - 12\\7x + 3x \geq 28 + 12\\10x \geq 40\\x \geq \frac{40}{10}\\x \geq 4\\\\ \left[\begin{array}{ccc}Opsi A\end{array}\right] [/tex]



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