3x+4y=7 dan x+2y=4 eliminasi

3x + 4y = 7 | ×1 |
x + 2y = 4 | ×3 |
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3x + 4y = 7
3x + 6y = 12
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-2y = -5
y = -5/-2 = 5/2
y = 2 1/2 = 2,5

x + 2y = 4
x + 2 (2,5) = 4
x + 5 = 4
x = -1

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