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Verified answer
3x + 5y = - 3 |×22x - 7y = 29 |×3
maka
6x + 10y = - 6
6x - 21y = 87
--------------------(-)
31y = - 93
y = - 3
subtitusi ke pers :
3x + 5y = - 3
3x + 5(-3) = - 3
3x - 15 = - 3
3x = - 3 + 15
3x = 12
x = 4
hp = { 4, - 3 }