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SMK Teknologi dan Rekayasa

Soal 25 Pertidaksamaan Linear Satu Variabel


Himpunan\ penyelesaian\ dari\ 4(2x-8)< 10(x+2)\ \ adalah\ ....\\a.\ \ \left \{ x\ |\ x< 13 \right.\left. \right \}\quad \ \ b.\ \ \left \{ x\ |\ x< -13 \right.\left. \right \}\ \ \ c.\ \ \left \{ x\ |\ x> -13 \right.\left. \right \}\\d.\ \ \left \{ x\ |\ x< -26 \right.\left. \right \}\ \ \ e.\ \ \left \{ x\ |\ x> -26 \right.\left. \right \}
Jawaban: e

\begin{array}{rcl}4(2x-8)&< &10(x+2)\\8x-32&< &10x+20\\8x-10x&< &20+32\\-2x&< &52\\x&> &-26\end{array}
(tanda\ ketidaksamaan\ berganti,\ karena\ dilakukan\ pembagian\ oleh\\bilangan\ negatif)

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