Selesaian dri sistem persamaan 3x+2y-4=0 dan x-3y=0

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Selesaian dri sistem persamaan 3x+2y-4=0 dan x-3y=0

Diketahui :
3x + 2y – 4 = 0
x – 3y = 0

Ditanya :
x dan y?

Jawab :
3x + 2y = 4 | ×1 |
x – 3y = 0 | ×3 |

3x + 2y = 4
3x – 9y = 0
________ –
11y = 4
y = frac{4}{11}

x – 3y = 0
x – 3( frac{4}{11} ) = 0
x – frac{12}{11} = 0
x = frac{12}{11}