hasil dari (5x+3y-7)+(x-5y-3)

(5x + 3y - 7) + (x - 5y - 3)
= 5x + 3y - 7 + x - 5y - 3
= (5x + x) + (3y - 5y) + (-7 - 3)
= 6x - 2y - 10
= (2 × 3)x - (2 × 1)y - (2 × 5)
= 2(3x - y - 5)