y-4x-11=0 dan 2x+y=1 tentukan metode gabungan

Mapel : Matematika

Jawaban:

[tex] \displaystyle y - 4x = 11 \\ 2x+y = 1 \\....................... - \\ - 6x = 10 \\ x = - \frac{5}{3} [/tex]

Substitusi [tex] \displaystyle x = - \frac{5}{3} [/tex] ke salah satu persamaan.

[tex] \displaystyle y - 4x = 11 \\ y - 4 \times - \frac{5}{3} = 11 \\ y = \frac{33}{3} - \frac{20}{3} \\ y = \frac{13}{3} [/tex]

HP = {x, y}
HP = {[tex]\displaystyle \frac{5}{3}, \frac{13}{3}[/tex]}

Semoga membantu...