dari sistem pertidaksamaan linear : 3x+4y=13 2x-3y=-14 Maka nilai y-x =......

3x + 4y = 13 | × 2 | 6x + 8y = 26 ... (1)
2x - 3y = -14 | × 3 | 6x - 9y = -42 ... (2)
Eliminasi (1) dan (2)
6x + 8y = 26
6x - 9y = -42
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• 17y = 68
y = 4
• 6x + 8y = 26
6x + 32 = 26
x = -1

Jadi nilai y-x = 4-(-1) = 5