Question

x+2x+3x+3x+4x+5x+6x+7x+8x+9x+10x=-165.tim x

Answer 1

X*(1+2+3+4+5+6+7+8+9+10)=-165

X*55=-165

X=-165/55=-3

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Answer 2

(1x + 9x) + (2x + 8x) + (3x + 7x) + (4x + 6x) + 5x + 10x = -165

10x^6 + 5x = -165

= 65x (-165)

= -100

Answer 3

Cái gì đây nhờ? [???-100???]